[This review was collected as part of a promotion.] Very good oil at a very good price for our fleet.

I buy this diesel oil for old flat tappet gasoline engines. Diesel oil still has zinc and other additives that old gas engines need.

[This review was collected as part of a promotion.] For a semi synthetic, WM have the best price on a quality oil.

Hard to rate it while its in the jug. Other reviewers love it. So I give it a three , we will se how it works in my duramax 6.6

[This review was collected as part of a promotion.] Excellent 15W-40 oil for use in light-medium duty diesel applications for the price.

Great price for a Mobil oil for Diesel motors. I always try to buy this when it is on sale since my CAT C7 motor requires 25 quarts.

[This review was collected as part of a promotion.] Mobil Delvac 1300, is an excellent product with a good reputation and excellent pricing.

Im using this product in my conventional truck, I used synthetic oil but this oil the truck runs smoothly, great oil

I have used this oil for many years and I have never had problems with my engine internally and it has passed a million miles.

if you know what you're using this for, then it's a great deal compared to what you would normally buy