I have been using Mobil oil for over 39 years and the equipment that I put the oil in is still running great.

My husband has a 2016 Peterbuilt and has always used Mobil Delvac. He will use nothing else in his baby!

The contain is my biggest issue, most gallon jugs are standard sized and fit the opening on the engine, these don't, which causes spillage.

[This review was collected as part of a promotion.] Its a quality product and priced better than others

[This review was collected as part of a promotion.] items take along time to recieve and not good on letting me know

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

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.

Use this oil in my boat’s diesel engines. Meets Volvo’s specs and with the Black Friday discount was a GREAT buy.

i use this in both of my 99 F250s with the 7.3l. four gallons fit like a glove. one engine has over 400,000 miles and still going strong.

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