BigSix
Registered User
I'm starting to see Valvoline Premium Blue on the shelves at the auto parts stores. I picked up three gallons this week for my next change. I've been using Rotella since '95 with good results but since Premium Blue is Cummins' recipe, I thought I'd start using it in my '03. Premium Blue is what's in the engine from the factory. Castrol used to brew Premium Blue for Cummins but the contract has since gone to Valvoline. I like to stay with API approved oil for warranty reasons. Anyone else likely to use Valvoline Premium Blue if it becomes available to you?