So I was wondering how long between rotella synthetic oil changes do some of you guys wait.

do you wait for the message center on the truck tell you when to change it?

do you do it once a year?

I am coming up on 11,000 miles and the gauge is saying I have 27% oil life still left and in 2 months I will be coming up on a year. This seems to be a little to long for my liking but being a diesel I wasn't sure if this is normal.

Any help would be great thank you