Best oil I've ever used in any tractor! Literally cleans the engine and you can go more miles in between changing oil than with other brands. All my tractors are diesel, would highly recommend!

Great product except the shipping

Motorhome uses 4 1/2 gallons so this saves me a pile of money on okl changes.

Best price around, use Mobil one in all my vehicles

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.

For my diesel truck I like this oil because it has the Zinc required for the engine.

Great oil for my motorhome

Great price on sale. Works as good as any other product.

Good oil, Used it for years.

Very good oil. Have been using for quite some time with good results.