- Joined
- Apr 22, 2016
- Messages
- 1,237
My parents have a new Tiffin Allegro with the Cummins ISB 6.7, its a Freightliner chassis. The RV is in Florida and will spend most of the time east of the rockies. I tried to look on the website for service information but Tiffin is really lacking on this material. Since this will be under constant load ( heavy RV ) and spend most of the time in warm weather what oil would be good to use? Also, OCI's? I was thinking Rotella T 15w40 @ 7500 miles, any suggestions?