MPG's

Jimmy-SS · 06-01-2008, 01:47 AM

god damn, i just filled in northside of Chicago and for 16.79 gallons = 73.00

i was able to pull of 17 miles per gallon for that week

not bad for 1996 Jimmy w/129k miles

cpolaris502 · 06-01-2008, 01:51 AM

that is rediculous! we used to be able to fill our suburban's 44gal for that much.

$4.35/gal? the world is coming to an end soon...

Jimmy-SS · 06-01-2008, 02:06 AM

i forgot to mention 87 octane

beaniebmx · 06-01-2008, 08:51 AM

all the signs in town are pegged at $3.89 for 89oct and $3.99 for 87oct

went up to the lakes and seen $3.84 89oct and $3.94 87oct

dunno if thats actual prices or if gas is over $4...

i have a 3 cent off gallon coupon.. but it doesnt really take much off, 10 gallons is 30 cents.. it helps, but it doesnt do anything

im above 1/2 tank and ive gone 130ish miles

AE86 SR5 · 06-01-2008, 08:06 PM

I have gotten up to 23mpg out of my 93 2dr

Jimmy-SS · 06-02-2008, 03:41 PM

Quote: Originally Posted by AE86 SR5

I have gotten up to 23mpg out of my 93 2dr

is that street or HWY?

gchemist · 06-02-2008, 09:37 PM

I've gotton 20.5 MPG at 80 MPH!! With four doors and loaded!! Reprogrammed PCM!

cpolaris502 · 06-02-2008, 11:05 PM

my max is 24.5 on the highway.

AE86 SR5 · 06-03-2008, 02:50 PM

Quote: Originally Posted by Jimmy-SS

is that street or HWY?

Both street and high way. Thats driving it like an oldman tho.

My 98 blazer is getting 20mpg

ZQ8 Blazer · 06-07-2008, 02:23 AM

Mine was getting 18 mpg, after I lowered it and put the exhaust on it got 20 mpg, but I haven't figured it up in months. it has 142k on it. Inow drive 10mph lower than the posted speed so I need to figure it up again **** all those idiots that speed!

PimpingA1997Jimmy · 06-07-2008, 09:38 AM

i think the most i ever got was 23 - 24 on long highway trips that was with 120k new pluds wires oil change and tires
now im pulling like 20-22 on the long higwasy trips short higway is like 20 i think city is like 17-18 mix and mach would be like 18-19 and that is with 156k

gchemist · 06-07-2008, 12:12 PM

Alright!! Went through the first full tank after having the PCM reprogrammed. Normally MPG were 16-17. The first tank put out 18.5! Or about 1+ MPG more. Even with being stuck in dead stop traffic for 1 hour. At that rate, the $85 will pay for it self quickly. Not bad for a 4 door and simple modifications done to the Jimmy.

Evil_s10 · 06-08-2008, 12:56 AM

i get regularly 15 city driving only. I recently did a tune up and still the same. I am gonna be doing a water pump, intake manifold gaskets and while im at it im going to do the 03 and up injector setup as mine seems to have a miss to it still.

All this on a 98 blazer 4dr 2wd with 140k.

gchemist · 06-08-2008, 01:45 AM

You should see a slight improvement with the updated spider. My Jimmy 4.3 responds very nice to throttle demand.

I think the next mod is an electric fan. Texas is hot, so the clutch fan engages any time I turn off the engine for little bit. Even idling at a light or traffic, the clutch fan engages with the A/C on.

Did I mention mine is a 4 door Jimmy? +155322+ miles on it too.

MrHotdog · 06-08-2008, 02:19 AM

i was getting about 18-20 out of mine but needs tune up so only getting 16 right know. i have a 97 blazer 4x4 4 door with 130k. and that was mixed driving.

***Wicked Mayhem*** · 06-08-2008, 02:32 AM

my blazer gets 15mpg in town.

i drove one tank SUPER slow and didnt get on it any and got 13 mpg.. gay

now that i got the 2.2 s10 running good i plan on driving that some!

ZQ8 Blazer · 06-08-2008, 04:24 AM

^WTF? What are you do you have 2 plug wires loose or something crazy? My grandfathers 97 ext. cab Z-71 does better than that.

PimpingA1997Jimmy · 06-08-2008, 10:20 AM

Is it trued that when you run your AC your MPG goes down and by how much would you say it would go down ?

GeorgesBlazah · 06-08-2008, 01:57 PM

Quote: Originally Posted by PimpingA1997Jimmy

Is it trued that when you run your AC your MPG goes down and by how much would you say it would go down ?

AC on around town will hurt your mileage, but if you are on the highway AC helps.

Jimmy-SS · 06-08-2008, 02:59 PM

man i just hit 221miles i'm just a little over the the halfway mark. street and hwy. i'm working on a oil change, pcv, whipper blades, a/c, alighment, tire balance, rear axle seal replacement, differential fluid change and rear brakes. should be done tonite.

PimpingA1997Jimmy · 06-08-2008, 03:25 PM

I am confused how come ac hurts on city but helps on higways ?

just called the mechanic going to get the fuel filter changed going to charge me 79 for a fuel filter and the labor plus tax

will a fuel filter help the MPG ?

ZQ8 Blazer · 06-09-2008, 06:05 AM

I seen the mythbusters where they tested this theory on 2 identical cars and they got the same mpg. However this wouldn't be true for all vehicles. The pulley is always spinning but when you turn the a/c on the clutch lets go putting a slight bit of extra load on your serpentine setup. Now that clutch also kicks in and out when the a/c is off, it does this to circulate the oil so nothing locks up. This is one good reason why there will be very little difference in mpg weather the a/c is on or off. You may get slightly better mpg if you took the a/c compressor out, but it's not worth it.

You'd get worse mpg in the city than the highway for 2 reasons. 1. stop and go driving. 2. with the stop and go driving and the a/c running the engine has to work a little harder on take off, while with highway driving you already have your rpm's built up and it's still working slightly harder than if the a/c was off, but not as hard as when you take off.

4UH8Rs · 06-09-2008, 07:24 AM

i got a ?:

how do you guys know exactly how much miles youve driven on an exact gallon of gas?

PimpingA1997Jimmy · 06-09-2008, 09:12 AM

just taking a guess the way i do it is ill filled up the tank before a roud trip then get on the hhighway make sure the station is righ tnext to the highway then ill drive and ones i hit half a tank ill refill and then ill take how much gas i had to put in the car then ill devide it by how many miles i have driven

ZQ8 Blazer · 06-09-2008, 10:02 AM

I just know that a vehicle uses more gas in the city than the highway. To figure my average mpg up I:
Fill the tank all the way up, record how many miles are on the odometer, use 1/2 tank, fill it up again, record the miles on the odometer. Subtract the 2nd recording from the 1st to get how many miles I went on 1/2 tank. Divide that by how many ga. it took to fill it back up.

beaniebmx · 06-09-2008, 12:00 PM

i use the trip odometer

fill up till tank is topped off, reset trip and leave gas station, drive till near 1/2 tank and top the tank off, say i used 10 gallons and i drove 200 miles, that means average is 20mpg.

easiest way. it averages it all together, so if you do 50/50 city and highway itll be mixed. if you want highway, you have to fill up and start over before highway and after highway

GeorgesBlazah · 06-10-2008, 05:48 PM

Quote: Originally Posted by PimpingA1997Jimmy

I am confused how come ac hurts on city but helps on higways ?

just called the mechanic going to get the fuel filter changed going to charge me 79 for a fuel filter and the labor plus tax

will a fuel filter help the MPG ?

With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower.

cpolaris502 · 06-11-2008, 12:35 AM

Quote: Originally Posted by GeorgesBlazah

With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower.

i believe mythbusters tested that one but i dont remember the answer.

and yeah, just reset the trip everytime i fill up. now with my Bravada overheard console this year, it will tell me all of that and more.

BudRacing · 06-11-2008, 12:45 AM

Quote: Originally Posted by GeorgesBlazah

With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower.

This was a little flawed. I didn't have my A/C working for about 2 years and only had the windows cracked on the highway so the air coming in was just stirred up from the vent-a-shades. I got great mileage--sometimes 26mpg on long trips.
Who drives on the hwy with the windows completely down?

gchemist · 06-11-2008, 01:41 AM

The most efficient MPG change is locking the torque converter. GM used very loose converters and programming. Especially on 4 doors. Reprogramming the PCM is necessary. Saving 200-300 RPMs increases MPG.

PimpingA1997Jimmy · 06-11-2008, 02:09 AM

Quote: Originally Posted by cpolaris502

i believe mythbusters tested that one but i dont remember the answer.

and yeah, just reset the trip everytime i fill up. now with my Bravada overheard console this year, it will tell me all of that and more.

all i have on my over head counsle is the temp outside wondering if i go to ta junk yard and pick up the overhead counsle of one with all the options like the bravada with the trip and all overhead
can i set it up to work in the jimmy ?

PimpingA1997Jimmy · 06-11-2008, 02:10 AM

Quote: Originally Posted by BudRacing

This was a little flawed. I didn't have my A/C working for about 2 years and only had the windows cracked on the highway so the air coming in was just stirred up from the vent-a-shades. I got great mileage--sometimes 26mpg on long trips.
Who drives on the hwy with the windows completely down?

i do that yikes i guess i was doing a realy bad thing

ZQ8 Blazer · 06-11-2008, 04:22 AM

Quote: Originally Posted by gchemist

The most efficient MPG change is locking the torque converter. GM used very loose converters and programming. Especially on 4 doors. Reprogramming the PCM is necessary. Saving 200-300 RPMs increases MPG.

200-300 rpms at what speed? That's a big difference.

gchemist · 06-11-2008, 06:31 AM

At any speed until it locks. The torque converter spins more at take off. It will slip less as you pickup speed. At highway speed 200-300 RPMs is common.

I wish I could lock it in 3rd gear. Due to city driving.

My old 83 locks the converter in 3rd gear. I drive mostly in 3rd in town. Electronic transmission don't lock the torque converter until OD.

cpolaris502 · 06-11-2008, 08:25 AM

Quote: Originally Posted by PimpingA1997Jimmy

all i have on my over head counsle is the temp outside wondering if i go to ta junk yard and pick up the overhead counsle of one with all the options like the bravada with the trip and all overhead
can i set it up to work in the jimmy ?

it should work for you to. what you need is either the whole thing, or just the computer unit behind the display and the whole harness down to the dash. it doesnt matter if you get the whole console or not, mine has the homelink on it also.

PimpingA1997Jimmy · 06-11-2008, 01:19 PM

Quote: Originally Posted by cpolaris502

it should work for you to. what you need is either the whole thing, or just the computer unit behind the display and the whole harness down to the dash. it doesnt matter if you get the whole console or not, mine has the homelink on it also.

is this somthing that was standard on all bravadas ? so i dont have to go hunt down and look at eveyr bravada i can just go and pick it up and put it in ?

cpolaris502 · 06-11-2008, 09:11 PM

as far as i know they are pretty standard, you're 97 should be the same for the wiring of it. i dont know for sure though.

hkellogg · 06-12-2008, 08:25 AM

I was averaging 18 or so now 15.5 after a new fuel pump and sender

Yogi · 06-12-2008, 12:33 PM

Quote: Originally Posted by cpolaris502

as far as i know they are pretty standard, you're 97 should be the same for the wiring of it. i dont know for sure though.

You need the harness that goes from the driver's side kick panel to the homelink and the digital display.

PimpingA1997Jimmy · 06-12-2008, 05:39 PM

Quote: Originally Posted by Yogi

You need the harness that goes from the driver's side kick panel to the homelink and the digital display.

now do i need to look for 1995 - 1997 or will the units be the same from 95 -2001 so i get the same thing that i have without the sunroof buttosn ?

Yogi · 06-12-2008, 06:50 PM

They look the same. I put one from a 2002 Bravada in my '98 Blazer and it works, but the gas mileage is off by a couple of mpg. My '98 came from the factory with Homelink & digital trip computer so I didn't have to worry about the harness. I don't know what you mean about the sunroof buttons.

cpolaris502 · 06-12-2008, 08:27 PM

you need a long console, they are for trucks without a sun roof. you will be able to tell very easily because the short one is like less than a foot long.

Shawn-GMC · 06-12-2008, 11:18 PM

woo made it up to 315kms this time :P good $78 dollars spent to fill her up to..canadian

PimpingA1997Jimmy · 06-12-2008, 11:59 PM

i did a few searched called on yard about 2 hours away they are going to call me back tomorrow and let me know he has a few bravadas out there so hes gona look in the morning

there isnt some guage i could go buy that is a digi that i could hook up that would tell me about how many miles i have exactly or that tells me how many MPG i avg is there if i cant get ahold of one of these local or close buy is ther a gugage i can go pick up somewhere ?

cpolaris502 · 06-13-2008, 01:52 AM

no, its all read off of the computer and stuff. so, unless you want to do some major electrical work, the bravada is the only way to do it. or like i said, you can just swap out the compass part of it and the wiring.

Yogi · 06-13-2008, 11:19 AM

The Scangauge (Click here) will work for you.

Your best bet is to get a console off E-bay. That's what I did. $49. Click here for one for sale now.

cpolaris502 · 06-13-2008, 08:56 PM

Quote: Originally Posted by Yogi

The Scangauge (Click here) will work for you.

Your best bet is to get a console off E-bay. That's what I did. $49. Click here for one for sale now.

ha ha, i read the word scanguage like you say language. i was so confused.

06-01-2008, 01:47 AM	#1
Jimmy-SS Registered User Age: 32 Join Date: Aug 2007 Posts: 40 Location: User is: OffLine	MPG's god damn, i just filled in northside of Chicago and for 16.79 gallons = 73.00 i was able to pull of 17 miles per gallon for that week not bad for 1996 Jimmy w/129k miles
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06-01-2008, 01:51 AM	#2
cpolaris502 The Dreamsicle Age: 20 Join Date: Jul 2005 Posts: 16,052 Location: Rogers, MN User is: OffLine	Re: MPG's that is rediculous! we used to be able to fill our suburban's 44gal for that much. $4.35/gal? the world is coming to an end soon... Last edited by cpolaris502 : 06-01-2008 at 01:52 AM.
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06-01-2008, 02:06 AM	#3
Jimmy-SS Registered User Age: 32 Join Date: Aug 2007 Posts: 40 Location: User is: OffLine	Re: MPG's i forgot to mention 87 octane
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06-01-2008, 08:51 AM	#4
beaniebmx Has Training Wheels Join Date: Jun 2007 Posts: 2,465 Location: Iowa User is: OffLine	Re: MPG's all the signs in town are pegged at $3.89 for 89oct and $3.99 for 87oct went up to the lakes and seen $3.84 89oct and $3.94 87oct dunno if thats actual prices or if gas is over $4... i have a 3 cent off gallon coupon.. but it doesnt really take much off, 10 gallons is 30 cents.. it helps, but it doesnt do anything im above 1/2 tank and ive gone 130ish miles
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06-01-2008, 08:06 PM	#5
AE86 SR5 Registered User Join Date: Nov 2007 Posts: 751 Location: User is: OffLine	Re: MPG's I have gotten up to 23mpg out of my 93 2dr
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06-02-2008, 03:41 PM	#6
Jimmy-SS Registered User Age: 32 Join Date: Aug 2007 Posts: 40 Location: User is: OffLine	Re: MPG's Quote: Originally Posted by AE86 SR5 I have gotten up to 23mpg out of my 93 2dr is that street or HWY?
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06-02-2008, 09:37 PM	#7
gchemist Registered User Join Date: May 2006 Posts: 356 Location: Austin User is: OffLine	Re: MPG's I've gotton 20.5 MPG at 80 MPH!! With four doors and loaded!! Reprogrammed PCM!
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06-02-2008, 11:05 PM	#8
cpolaris502 The Dreamsicle Age: 20 Join Date: Jul 2005 Posts: 16,052 Location: Rogers, MN User is: OffLine	Re: MPG's my max is 24.5 on the highway.
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06-03-2008, 02:50 PM	#9
AE86 SR5 Registered User Join Date: Nov 2007 Posts: 751 Location: User is: OffLine	Re: MPG's Quote: Originally Posted by Jimmy-SS is that street or HWY? Both street and high way. Thats driving it like an oldman tho. My 98 blazer is getting 20mpg
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06-07-2008, 02:23 AM	#10
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,722 Location: Western, Ky User is: OffLine	Re: MPG's Mine was getting 18 mpg, after I lowered it and put the exhaust on it got 20 mpg, but I haven't figured it up in months. it has 142k on it. Inow drive 10mph lower than the posted speed so I need to figure it up again **** all those idiots that speed!
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06-07-2008, 09:38 AM	#11
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's i think the most i ever got was 23 - 24 on long highway trips that was with 120k new pluds wires oil change and tires now im pulling like 20-22 on the long higwasy trips short higway is like 20 i think city is like 17-18 mix and mach would be like 18-19 and that is with 156k
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06-07-2008, 12:12 PM	#12
gchemist Registered User Join Date: May 2006 Posts: 356 Location: Austin User is: OffLine	Re: MPG's Alright!! Went through the first full tank after having the PCM reprogrammed. Normally MPG were 16-17. The first tank put out 18.5! Or about 1+ MPG more. Even with being stuck in dead stop traffic for 1 hour. At that rate, the $85 will pay for it self quickly. Not bad for a 4 door and simple modifications done to the Jimmy.
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06-08-2008, 12:56 AM	#13
Evil_s10 Registered User Age: 24 Join Date: May 2003 Posts: 219 Location: cincinnati, oh User is: OffLine	Re: MPG's i get regularly 15 city driving only. I recently did a tune up and still the same. I am gonna be doing a water pump, intake manifold gaskets and while im at it im going to do the 03 and up injector setup as mine seems to have a miss to it still. All this on a 98 blazer 4dr 2wd with 140k.
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06-08-2008, 01:45 AM	#14
gchemist Registered User Join Date: May 2006 Posts: 356 Location: Austin User is: OffLine	Re: MPG's You should see a slight improvement with the updated spider. My Jimmy 4.3 responds very nice to throttle demand. I think the next mod is an electric fan. Texas is hot, so the clutch fan engages any time I turn off the engine for little bit. Even idling at a light or traffic, the clutch fan engages with the A/C on. Did I mention mine is a 4 door Jimmy? +155322+ miles on it too.
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06-08-2008, 02:19 AM	#15
MrHotdog Registered User Age: 28 Join Date: Dec 2007 Posts: 22 Location: User is: OffLine	Re: MPG's i was getting about 18-20 out of mine but needs tune up so only getting 16 right know. i have a 97 blazer 4x4 4 door with 130k. and that was mixed driving.
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06-08-2008, 02:32 AM	#16
*Wicked Mayhem* Moderator Join Date: Nov 2002 Posts: 16,350 Location: :noitacoL User is: OffLine	Re: MPG's my blazer gets 15mpg in town. i drove one tank SUPER slow and didnt get on it any and got 13 mpg.. gay now that i got the 2.2 s10 running good i plan on driving that some!
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06-08-2008, 04:24 AM	#17
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,722 Location: Western, Ky User is: OffLine	Re: MPG's ^WTF? What are you do you have 2 plug wires loose or something crazy? My grandfathers 97 ext. cab Z-71 does better than that.
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06-08-2008, 10:20 AM	#18
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's Is it trued that when you run your AC your MPG goes down and by how much would you say it would go down ?
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06-08-2008, 01:57 PM	#19
GeorgesBlazah Slap my meat on your pita Age: 24 Join Date: Sep 2004 Posts: 7,214 Location: south jersey User is: Online	Re: MPG's Quote: Originally Posted by PimpingA1997Jimmy Is it trued that when you run your AC your MPG goes down and by how much would you say it would go down ? AC on around town will hurt your mileage, but if you are on the highway AC helps.
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06-08-2008, 02:59 PM	#20
Jimmy-SS Registered User Age: 32 Join Date: Aug 2007 Posts: 40 Location: User is: OffLine	Re: MPG's man i just hit 221miles i'm just a little over the the halfway mark. street and hwy. i'm working on a oil change, pcv, whipper blades, a/c, alighment, tire balance, rear axle seal replacement, differential fluid change and rear brakes. should be done tonite.
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06-08-2008, 03:25 PM	#21
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's I am confused how come ac hurts on city but helps on higways ? just called the mechanic going to get the fuel filter changed going to charge me 79 for a fuel filter and the labor plus tax will a fuel filter help the MPG ?
	[Reply w/Quote]

06-09-2008, 06:05 AM	#22
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,722 Location: Western, Ky User is: OffLine	Re: MPG's I seen the mythbusters where they tested this theory on 2 identical cars and they got the same mpg. However this wouldn't be true for all vehicles. The pulley is always spinning but when you turn the a/c on the clutch lets go putting a slight bit of extra load on your serpentine setup. Now that clutch also kicks in and out when the a/c is off, it does this to circulate the oil so nothing locks up. This is one good reason why there will be very little difference in mpg weather the a/c is on or off. You may get slightly better mpg if you took the a/c compressor out, but it's not worth it. You'd get worse mpg in the city than the highway for 2 reasons. 1. stop and go driving. 2. with the stop and go driving and the a/c running the engine has to work a little harder on take off, while with highway driving you already have your rpm's built up and it's still working slightly harder than if the a/c was off, but not as hard as when you take off.
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06-09-2008, 07:24 AM	#23
4UH8Rs Blazer User Age: 19 Join Date: Feb 2008 Posts: 330 Location: User is: OffLine	Re: MPG's i got a ?: how do you guys know exactly how much miles youve driven on an exact gallon of gas?
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06-09-2008, 09:12 AM	#24
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's just taking a guess the way i do it is ill filled up the tank before a roud trip then get on the hhighway make sure the station is righ tnext to the highway then ill drive and ones i hit half a tank ill refill and then ill take how much gas i had to put in the car then ill devide it by how many miles i have driven
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06-09-2008, 10:02 AM	#25
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,722 Location: Western, Ky User is: OffLine	Re: MPG's I just know that a vehicle uses more gas in the city than the highway. To figure my average mpg up I: Fill the tank all the way up, record how many miles are on the odometer, use 1/2 tank, fill it up again, record the miles on the odometer. Subtract the 2nd recording from the 1st to get how many miles I went on 1/2 tank. Divide that by how many ga. it took to fill it back up.
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06-09-2008, 12:00 PM	#26
beaniebmx Has Training Wheels Join Date: Jun 2007 Posts: 2,465 Location: Iowa User is: OffLine	Re: MPG's i use the trip odometer fill up till tank is topped off, reset trip and leave gas station, drive till near 1/2 tank and top the tank off, say i used 10 gallons and i drove 200 miles, that means average is 20mpg. easiest way. it averages it all together, so if you do 50/50 city and highway itll be mixed. if you want highway, you have to fill up and start over before highway and after highway
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06-10-2008, 05:48 PM	#27
GeorgesBlazah Slap my meat on your pita Age: 24 Join Date: Sep 2004 Posts: 7,214 Location: south jersey User is: Online	Re: MPG's Quote: Originally Posted by PimpingA1997Jimmy I am confused how come ac hurts on city but helps on higways ? just called the mechanic going to get the fuel filter changed going to charge me 79 for a fuel filter and the labor plus tax will a fuel filter help the MPG ? With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower.
	[Reply w/Quote]

06-11-2008, 12:35 AM	#28
cpolaris502 The Dreamsicle Age: 20 Join Date: Jul 2005 Posts: 16,052 Location: Rogers, MN User is: OffLine	Re: MPG's Quote: Originally Posted by GeorgesBlazah With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower. i believe mythbusters tested that one but i dont remember the answer. and yeah, just reset the trip everytime i fill up. now with my Bravada overheard console this year, it will tell me all of that and more.
	[Reply w/Quote]

06-11-2008, 12:45 AM	#29
BudRacing Molon Labe Age: 23 Join Date: Aug 2004 Posts: 4,924 Location: Statesboro, Ga User is: OffLine	Re: MPG's Quote: Originally Posted by GeorgesBlazah With your windows open on the highway its like a opening a parachute because the air comes in and deosnt go anywhere. You are more aerodynamic with the windows up at high speeds than leaving them down. Around town it deosnt matter because you are usally driving slower. This was a little flawed. I didn't have my A/C working for about 2 years and only had the windows cracked on the highway so the air coming in was just stirred up from the vent-a-shades. I got great mileage--sometimes 26mpg on long trips. Who drives on the hwy with the windows completely down?
	[Reply w/Quote]

06-11-2008, 01:41 AM	#30
gchemist Registered User Join Date: May 2006 Posts: 356 Location: Austin User is: OffLine	Re: MPG's The most efficient MPG change is locking the torque converter. GM used very loose converters and programming. Especially on 4 doors. Reprogramming the PCM is necessary. Saving 200-300 RPMs increases MPG.
	[Reply w/Quote]

06-11-2008, 02:09 AM	#31
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's Quote: Originally Posted by cpolaris502 i believe mythbusters tested that one but i dont remember the answer. and yeah, just reset the trip everytime i fill up. now with my Bravada overheard console this year, it will tell me all of that and more. all i have on my over head counsle is the temp outside wondering if i go to ta junk yard and pick up the overhead counsle of one with all the options like the bravada with the trip and all overhead can i set it up to work in the jimmy ?
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06-11-2008, 02:10 AM	#32
PimpingA1997Jimmy Registered User Age: 29 Join Date: Jun 2008 Posts: 783 Location: User is: OffLine	Re: MPG's Quote: Originally Posted by BudRacing This was a little flawed. I didn't have my A/C working for about 2 years and only had the windows cracked on the highway so the air coming in was just stirred up from the vent-a-shades. I got great mileage--sometimes 26mpg on long trips. Who drives on the hwy with the windows completely down? i do that yikes i guess i was doing a realy bad thing
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06-11-2008, 04:22 AM	#33
ZQ8 Blazer ZQ8 Blazer Age: 26 Join Date: Jul 2004 Posts: 8,722 Location: Western, Ky User is: OffLine	Re: MPG's Quote: Originally Posted by gchemist The most efficient MPG change is locking the torque converter. GM used very loose converters and programming. Especially on 4 doors. Reprogramming the PCM is necessary. Saving 200-300 RPMs increases MPG. 200-300 rpms at what speed? That's a big difference.
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06-11-2008, 06:31 AM	#34
gchemist Registered User Join Date: May 2006 Posts: 356 Location: Austin User is: OffLine	Re: MPG's At any speed until it locks. The torque converter spins more at take off. It will slip less as you pickup speed. At highway speed 200-300 RPMs is common. I wish I could lock it in 3rd gear. Due to city driving. My old 83 locks the converter in 3rd gear. I drive mostly in 3rd in town. Electronic transmission don't lock the torque converter until OD.
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06-11-2008, 08:25 AM	#35
cpolaris502 The Dreamsicle Age: 20 Join Date: Jul 2005 Posts: 16,052 Location: Rogers, MN User is: OffLine	Re: MPG's Quote: Originally Posted by PimpingA1997Jimmy all i have on my over head counsle is the temp outside wondering if i go to ta junk yard and pick up the overhead counsle of one with all the options like the bravada with the trip and all overhead can i set it up to work in the jimmy ? it should work for you to. what you need is either the whole thing, or just the computer unit behind the display and the whole harness down to the dash. it doesnt matter if you get the whole console or not, mine has the homelink on it also.
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