Diesel 5.9 cummins in a short full size bus is about as simple and low maintenance as it gets.
You can't get a good simple engine in these little one ton crappy buses.
10 miles to the gallon is a Real number that is obtainable. 15 is pure bullcrap from people that don't know how to calculate mileage.
There is simply no discution about gas vs diesel. Gas engines have a ton of parts to break down, and wear out that the 5.9 mechanical cummins won't.
The cummins is like a tractor. Always there to start and work when you need it.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization