Question about fuel economy.
Looking to possibly buy a van-based short bus with a diesel engine. Looking to go GMC/Chevrolet Savanah/Express, maybe an older G30 based bus. Was wondering if anyone knew the fuel economy of these rigs at 55-65mph.
I originally had an AWD Astro I lived in and a Tiger conversion of the Astro and was not happy with either but less so with the Tiger, my plan was to eventually add a high top to the AWD before it got creamed and totalled. Now with the AWD gasser I got 18 or 19mpg, if I were to add a high top, maybe 16 or 17mpg, with the Tiger XL I would be looking at 15 or 16 mpg.
Just wondering what I might be looking at for a short bus diesel.