if its warm there, it should work ok->well for you. i just noticed that it doesn't work as well as tection below 40 or so for me, and sucks fuel mileage down compared to the same. its certainly better and more robust than cheap gasoline engine oil (edit...even expensive brand name gas oil), can stay in grade longer too.Originally Posted by TC535i
my observations from using 10w40....the people still making 10w40 are slacking a little too much for me to keep using the stuff. all the ones i've tried in the last little while seem to go out of grade really quick compared to even 3 years ago. though i don't have an m60, i do have a 4 valve engine, and end up changing oil every 3 or 4 weeks or so (so i've tried a lot) IMHO if you want to use that grade, use a name brand one, which sort of negates the intent of "cheap".
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