04154 15W40 Oil, 1 Gallon (128 Ounces)

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

Received in a timely manner. Works as expected.

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

Great stuff

Used this oil in my 2005 Duramax, little pricy but well worth the price in my opinion

I bought this 5 gallon pail thinking I would get two oil changes for my diesel truck which needs 10 quarts per change. I carefully measured the quarts for the first oil change, using only 10 quarts. That should have left 10 quarts for the second change. When I did the next change, I came up 3/4 of a quart short. I called the company and was told they fill the pails by weight, not by volume or liquid measurement. I informed them that I had purchased 5 gallons, regardless of how they fill the pails and that i was now short for a complete oil change. The customer service person apologized and immediately sent me a couple quarts, free of charge. I was advised that they would be looking into the filling process to ensure that 5 gallons was in fact 5 gallons. It is a great synthetic oil and I am very happy with it. It deserves 5 stars and I would have given them except for the short change....

Just the best

I only run royal purple in my diesels.

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