royal purple

**artys only** · #1 02-25-2011, 01:30 PM

Does anyone run it in a duramax thinking about changin over also what wieght should i run and filter ?

**pwrstrkr** · #2 02-26-2011, 12:50 PM

Oil is like baby food....once you start it on one thing and it is working out dont change it up. I would run whatever oil you have ran in it from day 1. For me it is Rotella. it may not be true but I have heard from a few people is that Royal Purple is not a good oil to run in diesels because of how high its viscosity is and the oil pump has to work so much harder to build pressure....but that is just what I heard so whether it is true or not idk.

**redexpress** · #3 02-27-2011, 07:33 PM

It's pretty expensive and I'm not sure if it's worth it. They have a lot of personal endorsements on their website. All seems too good to be true. My only experience is with their industrial products. Their sales rep at the time was like a snake-oil salesman. Their products are a highly filtered PAO. Nothing wrong with that. They have all viscosities covered like everyone else. Your choice. Probably 5w-40 would be about right for your DuraMax. Just like synthetic Rotella would be. Plus, Rotella is available everywhere (WalMart) should you find yourself away from home and a couple quarts low.

**DSL_PWR** · #4 02-28-2011, 07:36 AM

Royal purple is not worth the money and not that good to run anyway. In my dmax I ran rotella or delo.

Stick with what ever you run now or have been running.

**Blue_Wave028** · #5 03-14-2011, 02:45 PM

I run the Royal Purple 15W40 in my Duramax and have been for the last 65k miles. Oil change intervals are every 8000 miles. I have noticed my truck will begin to burn it at about 7500 miles. I am going to keep running it.