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Tyler White
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108 Posts
Discussion Starter #1
i have a 1990 s10 with a 4.3 that has 299,000 miles on it and it's currently running pretty strong.

i'm definitely going to use seafoam on the top end of my engine, but with that many miles is there a chance that using it in the crankcase could do more harm than good? i'm just thinking some of the carbon could be holding the engine together. haha
 
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