Generally diesel would be preferred for power and ecconomy?
If you are running gasoline stuff, then propane used to be cheaper.
Trouble is, propane for whatever real reason, is in terrible short supply. They are talking about it over at the new ag talk site, and it has been that way around me since late summer. My coop said they don't think anyone ran out drying corn, but it got close. They were sending truckers down to your neck of the woods to get propane, as the pipelines up here were either shut off or had 22 hour waiting lines.
It was really doled out, had to fill tanks to only 40% some days so there was enough to go around.
Over at the new ag talk site couple people said tonite that wholesale propane went up 3 different times today alone, up 50 cents......
Things are not good in the propane world right now, I sure would not no how switch to it for something I depended on, something is up.
My coop says next fall looks to be setting up worse than this year, there will be issues.