Royal Purple 04154 15W40 Oil, 1 Gallon (128 Ounces)

My son and I use these in all our trucks. When he rebuilt one of his engines, there was little wear and tear above normal for 240,000 miles. There was hardly any carbon buildup at all. So we will continue to use this in our diesel vehicles And you cannot beat the price here on Amazon. They deliver right to your front door and all you have to do is go out drain your oil put in a new filter and fill it up and you’re ready to go for another 7500 to 15,000 miles depending on your preference

Received in a timely manner. Works as expected.

Royal purple is all I run in my 1990 Nissan 300 ZX TT

Royal purple came out the worst oil to use But the trans Syncro manual trans fluid is outstanding

I have used RP, Shell Rotella T6, and Valvoline Syntech (both semi and full synthetic), Valvoline Premium Blue and conventional dealership oil in my last 2 Cummins. The RP seems to do a pretty good job. No excessive valve noise, doesn't seem to burn off, good pressure at idle and higher RPM's (based on the RAM calculated oil pressure gauge) and runs about as cool as the Shell Rotella T-6 (190-201 F. at operating temp). I probably won't buy again though. For the price I think I am going to go Amsoil HD kit which is 12 quarts plus a filter for about $200 U.S. dollars. I'm going to try Amsoil at my next oil change. However, I have no complaints about the RP.

Used this oil in my Ford 7.3 with a slide in camper on the back. 5,000 miles driven. No loss of oil. Vehicle started and ran well. Toss up between Amsoil and Royal Purple. Make your own choice but Royal Purple does not make an oil filter for the 7.3. Extended drain intervals are good but you have to change your oil filter to extend. K&N were recommended by Royal Purple. Amsoil makes a filter so there is no inconvenience if you are traveling. All in all, it seemed to work well in my truck.

Exelente aceite para mi motor diesel de mi tractor yanmar af18 con eso vas a fija

Great stuff

I use this oil for 20 years and nothing never happens and when I open my engine they look like new

great product

Excellent oil, my tractor loves it

As advertised