Royal Purple83456 Diesel Motor Oil 10W30 HD CI/4, 1 Gallon

2017 6.7 Powerstroke. Been running this oil since 70k. Change every 7500 miles. Getting ready to trim 200,000. Still runs like new!Rotella T6 can kiss my a$$

If you own a diesel, and know that maintenance is the #1 key to having them last, then don’t mess around with cheap stuff. ROYAL PURPLE is the best for a reason, and thus close to same costs of other diesel oils but better. I’ve used Royal Purple in all my vehicles for years and when my last Yukon started to act up, pulling the bottom apart was amazed at how clean the entire bottom of the motor was. You can never go wrong with the Purple stuff

Been using this product for years more cars, trucks, tractors, generators, motorcycles and ATV’s and so on even transmissions and hydraulics too, all run so smooth with no problem’s even their oil filters are made for synthetics.

Ordered once thinking I was going to get as described and advertised to only receive 1 gallon of royal purple . Waited a few days to see if the other 2 would show up...nothing . So I asked for refund and received one. But then ordered again hoping there was a technical error to to receive 2 of the 3 gallons this time . Very frustrating and disappointing.

Calumet Specialty Products, a public company that makes Royal Purple Oil products but also is a major refiner. I use and have used Royal Purple Oil in all my cars/trucks for over 15 years and in my opinion you can't find a better oil whether for diesel or gas. I own several diesels, F-150 Power Stroke and Benz ML-350; and I also use their European blend of racing oil in my 2018 Porsche 911. I've done considerable research over the years and even bought their stock. Can't find any better than Royal Purple!