That statement from mobil is bs IMO, no offense. If you look at the specs they are identical and also if you look at a virgin oil analysis, the two are nearly identical, the difference could easily be within the margin of error in the testing.. Plus I've been on the phone with mobil and have been told it was the identical oil. IT seems different employees have different answers to that question.

For the record I've done oil analysis with both d1 and t&suv and both are fantastic in my truck, and I have mixed them in the past when I didn't have enough of one kind to fill all the way..no issues.

 

That's great news. My local Wally World just recently starting stocking the quarts, but as of last week they still didn't have the 5 quart jugs. If they start carrying the big jugs then I'll probably start using it.