Lucas Oil 10299-PK4 Synthetic 15W-40 CJ-4 Truck Oil - 1 Gallon Jug, Pack of 4 Sold in case packs of 4 Lasts twice as long as ordinary 15W-40 oil Great for diesel and gas pickups, SUV's, and heavy duty lawn equipment Meets the new engine specs and still work well in older engines Has been tested in semi's up to 30,000 miles and still meets specifications