I drive a 95 retired mountain fuel 3/4 ton truck that was converted by them. Yes it has less power, yes you have to fill up alot, (14 gal tank) but cost very little to drive, right now in Price it's .63 cents a gal. Cost $8.83 to fill up, if I fill the gas tank it costs 30x$3.10= $93.00 if you...