Mobil Delvac Extreme Heavy Duty Full Synthetic Diesel Engine Oil 15W-40, 1 Gal (3 pack)

from RyanN

Even on the older pre emission trucks, like mine, an old Cummins 12v, the additive package in this oil is quite robust and caters to it too. Awesome value here, esp with rebates combined. Use to run Rotella T6, but don't care for the newer formula in recent memory, so now running this Delvac Ex...

from Savedforever

Great oil at a a great price

from Richard

I don't know how Walmart does it but this is the best price on Mobil oil for diesel engines you will find

from Jerry

best oil you can buy for a diesel truvk

from Robert

Still too early but so far this is the only oil my dmax doesn't burn. It generally burns a quart or two every 7k. A nice side effect is the engine runs quieter as well. We are out of the cold season so can't answer to how it handles cold starts. Great price from Walmart vs auto parts stores.