Originally Posted By: tig1
Originally Posted By: TiredTrucker
Originally Posted By: tig1
What's wrong with 0-20 if your engine calls for it? I've used 0-20 for years with great success. One member here used it in his engine for 300K and it called for 5-30. There is no indication that 0-20 causes more engine wear according to the many UOAs we see here.
From what I gather from many posters is something like 0w20 affects their comfort level. I can see that. Unless I lived in the Arctic, I would just use 5w20 if I was going to stick with 20w. While 0w20 may be just fine, 5w20 would fit my comfort level better if I used a 20w oil. But I don't and have nothing that requires it. But in one of my engines that calls for 5w30, I run a 10w30 in it and it runs great. A 2006 Cadillac CTS 3.6L that called for a M1 5w30 by GM, but all it gets is a Pennz 10w30 conventional. That oil meets the 6094M standard that GM requires for the engine, and it does a stellar job. And that 11 year old car is not showing any sign of a problem. Tons of threads on other forums of that 3.6 LY7 engine experiencing timing chain issues and such, but not a hint of that in mine.
M1 0-20 AFE carries the GM 6094M rating.
And that means what? The engine never called for 0w20, and I have no motivation to use it. The engine called for M1 5w30 per GM and I use a 10w30 conventional. For an 11 year old car, that is doing great, warranty is not an issue.