- Joined
- Dec 1, 2013
- Posts
- 12,803
- Reaction score
- 12,501
- Location
- Bristol , Tn.
- Ram Year
- 2014 4X4 QC Express 6 speed auto 355 differentials
- Engine
- 5.7 Hemi
Based on UOA ( Used Oil Analysis ) results from labs like Blackstone Labs and others I've seen here and elsewhere some synthetic & synthetic blend oils loose their ability to properly protect the engine from wear at far less than 10k around 7ishwhere have you seen synthetic oci's recommened at 5k miles in the usa? From my understading, with regular dino oil, 5k is the new 3k. Synthetic is good for double the life of dino ( for the most part ), so that would put syn at 10k intervals.
Some oils make it to 10k + though .