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V6 nissan motor 230,000 miles, 6,000 miles oil changes since new w/Mobil 1. I drive 7 states so lots of highway miles. Interesting point is it cold starts quiet. Once warm when I stop and come back one hour later they click for a couple of miles then quiet. I added a pint of MMO and ran it 2,500...

I cannot find a current 1-1-07 chart listing the various oils and their additive break downs.(I've tried the search) The internet charts I see quoted are back in 1999 etc. Most do not know the world of oil has been changing. Thanks, John

The Mobil web site mentions the "std" Mobil 1 meets GF-4 and the Extended Performance does not. I've noticed now the new inventory of "std" Mobil 1 no longer states on the bottle "GF-4" either. Are they cheapening the oil? Or is GF-4 not necessary? Even the "cheap" dino oil states GF-4. Thanks, JU