oil Temp
#21
I quit wrenching yrs ago but back then engine parts would be heavily pitted from acids. Haven't had the need to take any late model engines apart and at this point have no idea what one might find. It will probably be another month or two before my bike will need an oil change but will pm you the results. I use 20w50 Amsoil. what is your favorite?
As for the pitting issue, I haven't heard about this type of problem in years. I talked with a corporate Mobil 1 engineer at one of our local XON plants recently and he said there isn't as much of a problem with acid accumulation as in the past. This is because oil formulations are better and there isn't as much sulfur in the gas as before. Water is a byproduct of combustion and it combines with sulfur to form sulfuric acid, and that's what causes most or all cylinder pitting. GM called it "crankcase dilution" in the old days and had a warning about it in the service manuals, but I don't worry about it as much as I used to. The TBN of any good synthetic oil is sufficient to absorb acids using any reasonable change interval.
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