I just recently bought a 1992 F250 4x4 that is duel fuel...both gas and LP gas(motor fuel/propane) but fuel pumps are broken. I have a 100 gallon tank in the back of the bed of the truck. I thinks its a cool set up because the oil is alot cleaner and the fuel last longer and its cheaper. The last fill up i got it for $2.20 a gallon and in Albuquerque its @ $2.15 a gallon. I talked to the propane seller and he told me that it might go up but its not as bad as gas and diesel. I havent really had an estimate on how many miles it will go on full tank but it usually last me three weeks to go 75miles rounds trip to school three time a week.
I also read that the 2 quarter of this year, the ford company will create new super duty that runs on natural gas but we have to see on that one.
If you have the convenience to access a propane dealer it will be great truck to have. in my town i have two dealer and both are licensed to sell motorfuel and one in Albuquerque. there are a couple in albuerque the prices are kinda high that these three places. Not all gas station that sell propane can refill your tank because the 5 gallon tanks have a small nozzle compared to the bigger tanks.
As for power,i havent notice anything about losing power. just last week i hauled a 16ft stock trailer with 3-pairs of cow/calf and 4 steers and it did good. Im satisfied with the truck... i hope i answered yout questions and good luck on your decision
