2004 ISL
We have '04 Tradition with ISL(370) Cummins, F/L chassis(chassis date July '03). We are about 3900 miles into our Alaska trip with an MPG average of 6.3. In the C/G I met a couple with an '05 Traditio...
Forum Discussion
60 mph in a 40' with ISL = 8.5 mpg.........68-70 in the same coach on the same road = 7 mpg........Most 38'-40' have equal rear gearing, but if they don't, it takes a heck of a gear difference to make that big of a difference.....Your weight and driving habits are the main contributing factors.
