That's why I haven't bought the oil change for my recent purchase...2001 National Tradewinds with a Cat 3126. Diesel generator needs service as well...
Heck conventioal 15-40 Rotella is cheaper than WalMart crap oil!!!! I was hunting some today and Wally was OUT of that Rotella, and I found some at Tractor Supply same price as friggin Wally!!!