Doug Patton
Senior Member
I know what Cummins says but what are owners actually doing about oil change Frequency? With the cost of a good oil doubling how important is the 12 month oil change when the coach (2011 Tour with 450 Cummins) is driven every month, stored inside and winters in Florida and only 8,000 miles put on it since last oil change (Valvoline Blue Synthetic).
