The Mobil 1 Truck & SUV 5w-40 oil ($4.77 qt in Wal Mart) is the same oil as Mobil Delvac 1 that's designed for diesels. The oil has the extra additive package to control soot in the oil. THe 15w-50 Mobil 1 does not have this additive package. That's not to say the 15w-50 Mobil 1 is not an excellent oil, it just that the Truck & SUV oil will handle the soot in the oil better.

__________________
'10 Chrysler T&C Stow-N-Go White. Grandpa's ride.

'13 Chrysler 200 Touring Candy Red. Grandma's ride.

Age and cunning will always over come youth and vigor.