Diesel Mileage
Recently purchased a 2006 Tradewinds 60D with the 400 HP Cummins and Alison transmission. I have heard of mileage reports of 8-12 mpg. What's real?!
Forum Discussion
There are just TOO MANY variables to compare mileage on a DP. The only real estimate anyone can provide will be 8 mpg plus or minus 3 mpg depending on your coach and driving habits.
We had a short/lite 2005 Monaco Diplomat (36') with a 400 ISL. I changed the rear radiator engine fan, added a computer chip and used a fuel additive. It was the last year for shorter tires on the Diplomats and my rpm at 58 mph was 1500. With that specific setup, we got 9.4 mpg towing a 4 door Silverado coast to coast and back. Without the truck in tow, we could get 10.1 -10.2 mpg. Again, this was at 58 mph.
We now have a 2014 40' with the ISL and a tag. On our first big trip, not towing and running 58 mph, we got 8.3 mpg. We did climb a lot of hills and hit heavy winds on 3/4ths of the trip. I have high hopes to get 9 mpg in better conditions and after break in.
The biggest denominator is speed....once you get past 60 mph, mileage drops off rapidly.
We had a short/lite 2005 Monaco Diplomat (36') with a 400 ISL. I changed the rear radiator engine fan, added a computer chip and used a fuel additive. It was the last year for shorter tires on the Diplomats and my rpm at 58 mph was 1500. With that specific setup, we got 9.4 mpg towing a 4 door Silverado coast to coast and back. Without the truck in tow, we could get 10.1 -10.2 mpg. Again, this was at 58 mph.
We now have a 2014 40' with the ISL and a tag. On our first big trip, not towing and running 58 mph, we got 8.3 mpg. We did climb a lot of hills and hit heavy winds on 3/4ths of the trip. I have high hopes to get 9 mpg in better conditions and after break in.
The biggest denominator is speed....once you get past 60 mph, mileage drops off rapidly.
