Re: Has Mobil 1 changed???
Ok this is what I have found out so far
The new M1 EP 5W-30 SM dated Oct 2006 just came out of the G.C. and it is MOSTLY mineral oil, presumably Group III. It also contains a good slug of AN and some PAO, but little or no ester
I have the Valvoline in my wifes Jeep
I am also going to try Royal purple in mine and see what does better Also looking to use a Wix oil filter
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