Originally Posted By: TKNY
Are there any temperature conditions that you would avoid the 0w40 in? I live in NYC so we dont really go below 0F in the winter and summer highs are usually in the 90s. Pretty mild range so I am assuming I will be fine.
The 0W40 is always thicker than the 5W30, at least down to freezing, which is when the viscosity charting tools don't get all that accurate...lets just say that they are a wash down to -18C (0F).
Originally Posted By: fdcg27
M1 0W-40 meets many Euro specs.
No M1 EP oil does so.
Some of these Euro applications allow drain intervals of well beyond the one year or 15K Mobil allows for the EP line, and there are a number of UOAs here that don't support the notion that M1 EP is a 15K oil in some applications.
M1 0W-40 is simply the more capable oil.
If I were the OP and wanted to use it, I'd do so with no hesitation.
Is a really really good point IMO, the 0W40 being extended drain for a few of the manufacturers and carrying a greater variety of specs, covers more bases...higher additive levels, which is allowable in the 40 grades and not in the 30s.
If the 0W40 is cheaper, use it happily...if it's the same price, then use it, just in case you have a really cold snap this winter, and need the 0W.