The 2 vehicles don't burn any oil to speak of.
In 2018 Mobil had a mail-in rebate program going on for this oil. Between their discount and my NAPA discount, I stocked up on it for around $10/gal. Now, in 2019, Mobil is having another mail-in rebate deal. So, now I've stocked up on Mobil Delvac 1 ESP 5w30. Between an O'Reillys 25% discount and Mobils rebate this oil will cost me $13/gal. See their "terms and conditions" for "participating retailers"..
You can find a UOA thread here that I made a week or 2 ago about the 5w40 in our 07 Yukon Denali w/6.2. I'll start another thread here soon in the UOA area about the other vehicle, an 07 Toy FJ Cruiser w/4.0.
Currently I've switched the 2 vehicles to the Mobil Delvac 1 ESP 5w30.
Last edited by jetman; 10/21/19 11:26 AM.