 866-90-REDI. Brought to you by FPPF, Fuel Power Max. The IFTA tax program redistributes tax revenue to states based on your actual miles run. Thus, the truly cheapest fuel can only be found if you subtract federal and state taxes and state surcharges from the pump price to compare. The strategy means that you buy without regard for whether you are paying more at the pump in taxes. IFTA also considers state surcharges.