- Joined
- Jun 3, 2021
- Messages
- 818
Valvoline Premium Blue Restore. Sold at Cummins dealers because Valvoline pays to be a Cummins partner.Valvoline makes an oil to clean engines up, ester based. I'm sure others will chime in, it's sold at dealers as it's made for 1 engine brand. Can't remember which though.