+1WrenchBender said:Rotella T Triple P in 15W40, used in a 1988 2GM20F.
My dad collects antique cars, Porsche 356's mostly, and is one of the few who actually prefers to drive them rather than "trailer queen" them... He has been running Rotella T in almost all of his old cars. The differences when these engines are opened up, compared to older oils, is simply amazing. Clean, no visible or measurable wear to speak of and no sludge or other crap anywhere. They also rarely if ever leak oil despite how they used to.....Many car enthusiasts have been noticing high wear rates and outright failures of camshafts in older engines with flat tappet cams. The problem is widespread and has been directly linked to oils with no, or reduced levels of Zinc additive. So while some may want to assume all oil is equal, it is clearly not. Again, most industrial diesels run flat tappet cams, and most OTR truckers and heavy equipment operators run Rotella T 15W45 for the very reason that it has an adequate amount of Zinc and is a proven high quality heavy duty rated oil for diesels that will also work in gas engines. At least for now. Castrol is generally good but they have been manipulating zinc levels within certain lines and grades and its become confusing. I used to run Castrol GTX in everything before switching to Rotella. One jug of oil and I use it in everything. Simple.
High quality oils and frequent oil changes and thats what the insides of engines should look like and thats how some guys can get 3 or 4 times the life out of an engine. When anyone says oil brand doesn't matter, don't buy anything from them, and especially not for top dollar.This is what the valve train looked like at about 2800 hours..
I do know a lot of commercial pilots. Okay, I will!Try telling the guy who's been operating aircraft in part 135 for half his life that oil brands dont matter.
D'oh! I've misspelled "friendly"! Hope Sully understands!To settle a freindly little wager, what if I told you "It doesn't matter what brand of oil was used in your aircraft engine, as long as it's the right service grade and viscosity"? Would you agree or disagree?
I await your kind reply. Thanks!
You are entitled to your opinion. Since you are probably running an outboard virtually any oil you picked up in an auto parts store while blindfolded would probably be ok for a season. Most of the cheaper engine oils out there are nominally engineered for cars, or spark ignition engines. The same can NOT be said for folks who own inboard engines, particularly diesels.I'd be more skeptical if they say one's better than another. Virtually anything commercially available today, with few exceptions, will suffice. It's mostly about viscosity at start-up.
But we know what is said about opinions.
Meh.