Quote:
Originally Posted by BenzBob
Is 5W30 a change for 2012? Oils certified as 229.5 (Mobil 1) were only 0W40 or 5W40 before. I wasn't aware that there were oils certified as 229.5 in the viscosities of 5W30 and 10W40.
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You're confusing Mercedes NA with Mercedes. Mercedes NA recommends Mobil 1 0w-40 because that's what Mobil tells them to say and pays them to say. It's not really an objective oil recommendation so much as puppetry or prostitution. It's convenient for them to recommend and sell one viscosity all over the country but more viscosity modifiers equals less lubricants.