I had one for a couple years. I think it got in the high 20s up to 30 mpg. I wasn't very good about measuring because I was running it on biodiesel, and so I was always putting in one or two 5 gallon jugs (I made the biodiesel, and stored it in 5 gallon jugs), and not topping it off. It was slow, and tended to be a bit smoky when it was cold, and it got slower and smokier as you went up in elevation. I imagine it might be fine in florida. Real easy truck to work on, as most stuff of that vintage is, and they used that motor in marine and forklift applications also, so parts are out there if you spend the time to track them down.