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Originally Posted by JCL12
cas951,
It is funny, hearing different reccomendations on oil from 3 separate sources that I all consider reliable - very anal enthusiasts, porsche AD, and the car's manual itself 
When did mobil 1 introduce its 0W-40? That might shed some light on some of this. I'd also assume that 0W-40 is best for cold weather and has the best flexibility for high temperature variance.
How about opening a open in poll on oil usage...such as 5w30, 10w30, 10w40, 15w40, 5w40, 0w40, etc and see what people are putting in thier car? |
One thing to always remember with oil...the greater the difference in multi-grade oil weights (seperation of viscosities at various temperature extremes), the less that oil will perform at any given range in that span. The additives known as VII do a good job at helping the oil acheive a sense of viscosity balance at OT vs. cold, but there is always a tradeoff! (nothing is free!) - so choose the MG oil with the smallest gap of viscosity range as possible to acheive your desired coverage.
Let's see if I can help start the poll for you.
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