Originally Posted by Timberdog
I own a freightliner Prism with the mercedes diesel, it's only 25' but the mileage is incredible. No toad I get 19 mpg unless it get a strong headwind like I did in Montana a couple weeks ago, went down to 15, still pretty good. Obviously not the same amount of space as in a full size coach but good for the the DW and myself. I will say one thing about diesel in the US, they have started to increase the amount of biodiesel in each gal. I know my engine is only supposed to use of 5%, might be something to remember if you decide to move forward with a diesel.
Fuel additives are a problem in both diesel and gas unfortunately.
The mileage issue seems to be a little murky. One costs more but gives better mileage, the other costs less but mileage is not as good.
One reason I haven't moved to diesel yet is the extensive maintenance and its related cost as compared to gas. I can get my oil changed, new oil and air filters and a lube for $60 or thereabouts.
Same service on a diesel is closer to $450 as I understand all the filters and amount of oil a diesel requires.
What I like about diesel is the quality of components, the heavy duty build approach to the chassis and the engine. Oh, and with the engine in back its a much quieter ride I believe.
Some might point out the net carrying capacity advantage of a diesel compared to gas but my particular Encounter has a NCC of 4100 pounds which is about what you would get in a diesel.
I would like a crisper turn-in and a smoother, bus like, ride but you can't have it all, (our Encounter can be jarring on rough pavement). I have played with tire pressures within the range for our weight load but didn't like the wear I thought I was starting to see. Subsequently pumped them up just a bit.
Even with all the chassis work my coach is still slightly slow to turn in and with the jeep attached, tends to oversteer once the front tires bite. When you make the operator adjustments to the handling characteristics, its no problem but a surer feel at the wheel would be nice.