Quote:
Originally Posted by snizzle
Did GM learn anything? Probably not if they're still chasing decreasing emissions and improving fuel economy. GM has stated the new V8s will do both.
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From things I have learned in the news and watching youtube videos... I gather that some OEMs just prescribed a lower viscosity oil on older platforms to meet fleet efficiency reqs, while other OEM's engines were designed around lower viscosities and actually changed clearances and used improved metallurgy on vulnerable parts, with lower viscosity oil factored into the design.
One would
HOPE that GM is doing the latter with GEN VI, if thin oil on GEN V really was an afterthought. You'll know the truth by checking what they prescribe for overseas use on the same engine, where emissions/mileage regulations are more relaxed or don't exist.