Richard Kim
Senior Member
- Joined
- Jan 23, 2018
- Posts
- 183
- Reaction score
- 260
- Location
- Houston, Texas
- Ram Year
- 2016
- Engine
- 5.7 hemi
2016 2500 5.7 with 110,000 miles. Engine sounds great; no tick (even cold starts). New PCV valve, oil catch can and I keep a close eye on the air filter. I run either PUP or RGT on 5K oil change interval. Experimented with OEM, WIX XP, Bosch, Fram Ultra, Mobil 1, Purolator Boss filters. Oil turns black at 5K no matter what filter is used. I guess I should be happy the detergent is doing it’s job. No oil burn (never added oil between oil changes). I know as the oil adds contaminants and holds them in suspension in the engine, the oil will blacken as a result of carrying them. I know the oil (TBN) might be still good but the contaminants bother me. Opinions? Shorten interval? Burla?