A correction to Jarlaxle's post RE the CAT 3208. This is a moderate size V-8 engine, it is 626 cubic inches or 10.4 liters. And it also is a relatively high RPM diesel, in typical Skoolie non turbo configuration it will run at 2800 RPM all day. I think the turbo version is rated at 2600. It should NOT be run for any length of time below 2000 RPM.