Re: Coach weight
Reply #7 –
John,
I expect you have the ISC engine with 24 valves and electronic fuel injection. Our engine is the older C8.3 with 12 valves and mechanical fuel injection. The posts and information I have read indicates that the newer engines get better fuel mileage. It looks like the ISC was put into production in 1998. Our coach was built in November, 1996.
We usually drive with cruise control set at 65 mph. If roads are rough we drive a bit slower. We never use economy mode on the transmission.
Since we have owned the coach, miles on the odometer/gallons of diesel fuel measured at the pump has yielded 7.1 mpg. My understanding is that the VMSpc will not work with our engine because the data are not available. There is no ECM on the engine.