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Would one of you gentlemen, dave1251 or Z ombie please post a link to some of these poor used oil analysis produced by Mobil 1? Could you also please provide your detailed analysis that eliminates all the variables and directly attributes the poor used oil analysis to Mobil 1's poor performance? Thank you in advance.
Instead of asking OTHER people to prove or disprove a position, why don't YOU do some data analysis? Pick out all the used oil analysis from the past two years that you believe are a fair comparison between M1 and an equivalent brand.
When people claimed that 5w30 conventionals usually sheered down to a 5w20 grade, that's exactly what I did to verify or nullify their claim.
Because I'm not the one making the unsubstantiated claims. If I did make such a claim and was asked to provide something to back that claim up I would have it available.
I believe it's more of a shared responsibility. Imagine the case where people just show up and ask for people to "prove" things to them instead of doing some homework on their own.
Further, M1's elevated Fe level has become such a signature trait to those who read a lot of the used oil analysis posted here that's it's even called....well...M1's Fe signature. Even people who have an undying love of all things from EM, like buster, will admit this.
And for the final pièce de résistance, search for Terry's comment. Little nuggets of gold.