206K miles on 2004 dodge Ram 1500, 5.7 Hemi.
Been a slacker and went 14,268 miles on Mobil 1 Extended Performance 5w30, Mobil 1-301 filter . Has used about 3 extra quarts during OCI. Oil looked pretty good though.
Replaced with 5 quarts of Mobil 1 Extended Performance 15w30, and some left over Mobil 1 0w30, and Syntec and and going for the 1st time with a cheaper filter, Walmart bought Motorcraft FL-1A.