Quote Originally Posted by Tiger
Mobil 1 Truck & SUV 5W40 is actually Delvac 1 and is much better than regular Mobil 1 oil... Better additives and higher tolerance.
It does not appear that Mobil 1 SUV 5w-40 is Delvac. It is showing lower levels of additive package and many now agree it is a different formulation. BTW, on Bobistheoilguy there is a UOA of my Toyota Landcruiser with 8000 miles on 0w-40 and another guys Landcruiser with the same motor and 5,000 miles on the SUV 5w-40 and my wear numbers were much lower.

http://theoildrop.server101.com/ubb/...=001903#000000

http://theoildrop.server101.com/ubb/...=001765#000000

http://theoildrop.server101.com/ubb/...=001262#000000


Here is the SUV 5w-40 and 0w-40 in the same vehicle, note the shorter mileage the SUV oil was run.

http://theoildrop.server101.com/cgi/...=001810#000000


Finally, the 5w-40 has much worse cold pumping numbers than the 0w-40. If you live where you are starting the car in colder than -10f weather, stay with the 0w-40.