GlampDaddy
RVF Supporter
- Joined
- May 3, 2020
- Messages
- 553
- Location
- From Deep in the Heart of Texas
- RV Year
- 2017
- RV Make
- Newmar
- RV Model
- Mountain Aire 4519
- RV Length
- 45
- Chassis
- Spartan K3
- Engine
- Cummins 500
- TOW/TOAD
- 2023 Ram 1500
I just took my coach to Freightliner Austin for an oil change and lube. The invoice says they used a 10w30 synthetic oil instead of the Cummins recommended 15w40. Their service manager is willing to correct the mistake, but feels strongly that the 10w30 is fine. My inclination is to stick with what Cummins says, and I am waiting on a return call from Cummins Support to hear their version. We're headed for the Badlands, Montana, etc in two weeks. What says this group?