fuel efficient Definition

energy-efficient, moped, clean, cleaned, efficiency, diesel, range, ranged, ranging, lean, aerodynamic, alcohol, ash, back, backfire, bak, battery, bike, boiler, boom, booster, burn, burn out, burnout, carbon, coke, coking, combustion, compelling, consumable, crud, cutoff, cycle, dandy, drive, duty, eat, eating, economizer, energy, engine, enliven, epa, feed, fire, firebomb, firebombing, fired, gaa, gas, gasoline, gasometer, govern, governed, hit, hog, hydrazine, hydrogen, hypergolic, igniter, ignition, incendiary, inject, input, insulation, jit, kindle, kindled, knock, light, lignite, log, magneto, metabolism, methane, mileage, motor, mouth, nack, octane, oils, oink, opec, overdrive, pink, pit, plutonium, pod, pof, power, powered, prime, pulsejet, pumped, pumps, pylon, race, ramjet, regulator, rich,