I'm a little past 6 months on my Duramax OCI, and I have put on very few miles on my truck. Between the pandemic, not having anywhere to go with my camping trailer last year (first places were closed, then when they opened up, I couldn't book anything), and getting a commuter beater this past fall, meaning even less in town driving for the truck. it probably will barely register 25% of use on the OLM by the time one year comes around.
I am using T6 0W-40 with a Hastings/Baldwin filter. Should I still change the oil at the one year mark, or am I good to extend this OCI? If I do, by how much could I comfortably extend it?
I am using T6 0W-40 with a Hastings/Baldwin filter. Should I still change the oil at the one year mark, or am I good to extend this OCI? If I do, by how much could I comfortably extend it?