SnoKing
TDR MEMBER
I have a story/lesson going the other direction. In the early 80's I purchased a 1976 Chevy K-20 that had about 70K+ miles on it. The seller said it have Mobil 1 in it. It burned oil and after a couple years I pulled the heads off the 350 and took them in thinking it was valve glides and seals. Nope they said the heads were fine. So I took them back home and put them back on a block that still showed the original honing in the cylinder walls, as I did not want to go deeper into it just then. A year or two passed and I pulled the engine, ran a ball hone in the cylinders and lightly used a ridge reamer on it, installed new rings and put it back together. Broke it in again and no more oil consumption. So I believe the lesson is the original owner switched it to Mobil 1 to early, and the OEM rings never seated.
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