Background: Car is a 2008 Chrysler 300 3.5L V6, bought new, Mobil 1 10W30 since 5,000km, now with 16,000km, doing 10,000km OCI (ok with warranty). Probably drive 10,000km in about 9-10 months, mostly normal city driving, 6 quarts per oil change.
With Advance Auto's new sale (5 quarts any Mobil...