I have used Delvac exclusively in my DD15 for its entire life. 888,000 miles and counting. With NO rebuild! Changed at 25k give or take with 1 gallon of Lucas also included. Never had a bad oil sample report.

I own a mobile diesel repair shop and this is buy far the best oil for the money i cant touch oil of this quality for cheaper then this

Very competitive price excellent oil

[This review was collected as part of a promotion.] I use this on wet clutch applications and have been for many years without a single problem.

[This review was collected as part of a promotion.] Been using it for years. Price was great so I ordered more than I needed.

Please change color of jug. Very hard to see amount of oil remaining in jug when doing partial usage

20k oil change intervals. works great.

Great price on bulk oil for my Chevy diesel truck. It's always fun to shop At my local Sam's Club.

Great product and have using this for all my vehicles

I use it in my 2500 ram diesel,works great…..