Most people, given the choice, will take the diesel. As far as why most landscapers choose diesel, it's mainly because they want one. Most of us don't even need V8 gas engines, and there are several outfits around here using Nissan 4cyl/V6 trucks.
Most diesels are at least $6k more, right? That plus the maintenance costs will buy an awful lot of gas. Unless you put high miles on the truck, or pull a heavy rig, gas is going to be cheaper in the long run.
Do not meddle in the affairs of dragons. Because you are crunchy and taste like chicken.
Endless Summer Lawn Care