- Joined
- Nov 23, 2020
- Messages
- 754
I think it depends on oil quality. I changed mine using the OLM between 6,000 and 9,000 miles. The valve train was very clean. Only used synthetic since I bought it with 60,000 miles.Dipstick looks nice and clean. They tend to get heavy varnish just above the operating range with extended oil changes.