Oil Questions
I did a search, and came up with Chevron Delo being ok to use. The previous owner said he used Castrol RX 15-40. Should I continue to use Castrol or is a switch to delo ok? The truck has 57,000. I called and asked for the Castrol RX, and the guy at the auto store, and he had never heard of RX.
As far as the 15-40, I live in the San Francisco CA area, so its not that cold.
Am I on the right track? Thanks





