synthetic oil comparison

[MosportGreen66]

I hate to hijack your thread, but this is on topic…

I recently talked with my mechanic about gas prices and related topics. He said in all the muscle cars and a drag cars coming through the shop, he has been changing the oil with diesel truck oil because of its high levels of viscosity. When I asked why not a 5w50 or 10w40, he said that increased levels of ethanol in the regular car oil is making these hi-compression engines run like junk and in an extreme case, he has seen a cam shaft go bad on race car.

I thought this was interesting. Now back to you Tim.