1967-1979 Ford F-100/F-150 — MPG & Fuel Facts NO OFFICIAL EPA RATING

The EPA's public fuel-economy dataset only goes back to 1984 — the 1967-1979 Ford F-100/F-150 predates it, so there is no government-rated MPG number for this car anywhere, including here.

Estimated 9–22 MPG combined.

Official EPA/FEA Gas Mileage Guide tests show a 300 CID inline-six with a manual and a tall axle reaching 20-22 mpg on the 1976-77 combined-cycle methodology, while 360/390/400 CID V8s with automatics and lower towing axles fall to 12-15 mpg combined; a harsher, in-town-only 1974 EPA cycle put loaded V8/automatic trucks as low as 9 mpg. The range is genuinely this wide because of engine and axle choice, not measurement inconsistency.

This is our estimate, not an EPA rating — built from the period road tests, marque-specialist guides and corroborated owner reports cited below, hedged where sources vary. Treat it as a ballpark for planning, not a spec to rely on.

Ford's F-Series bumpside/dentside trucks of this era offered a 240 or 300 CID inline-six as the base engine and 302, 351, 360, 390, and (from 1973) 460 CID V8s as options, paired with 3-speed manuals, a floor-shift 4-speed, or C6/FMX automatics, and a wide spread of rear-axle ratios (roughly 3.00 to 4.11+) depending on GVWR and towing package. That combinatorial spread is exactly why the truck's real-world MPG has no single honest number.

The EPA/FEA published an annual 'Gas Mileage Guide' covering light-duty trucks starting with model year 1974, using the same government test procedures applied to passenger cars. Ford's 'Pickup' line (the guide does not separate F-100 from F-150 by name, since the two share drivetrains and differ mainly in GVWR rating and springs) appears in the 1974, 1976, and 1977 guides. The 1974 guide used a single 7.5-mile in-town/suburban cycle with no highway component, so its numbers run noticeably lower and are not directly comparable to the 1976-77 'combined' figures — this methodology change, not a contradiction between sources, explains most of the spread below 12 mpg.

A period first-person account (Curbside Classic, reprinting a road-trip log) measured 21 mpg from a 240 CID six with an overdrive transmission held around 1,900-2,100 rpm at 65 mph — consistent with the top of the EPA six-cylinder range. A long-running Ford Truck Enthusiasts forum thread converges on a rougher rule of thumb of 10-12 mpg city / 16-18 mpg highway across the era, which is weaker evidence but corroborates the same general band.

Sources: EPA/FEA 1976 Gas Mileage Guide (fueleconomy.gov, official scanned PDF) · EPA/FEA 1977 Gas Mileage Guide (fueleconomy.gov) · EPA 1974 Gas Mileage Guide for Car Buyers (fueleconomy.gov) · Curbside Classic — "I Take My 1966 F100 On A Road Trip — And Get 21 MPG" · Ford Truck Enthusiasts forum — "67 F100 Mpg"

All classics Search Ford F-100/F-150 on FuelFacts (in case a later model year is in our 1984+ EPA data)