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Anyone else mix in some Mobil 1 15W50 with the 0W40?
I'm going to run M1 5W50 in the future.
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires." 
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