2004 Ford F150 Dual-fuel 2WD (LPG) MPG & Specs — Real-World vs EPA, All Trims
Fuel grade varies by trim — see the breakdown below.
Is the 2004 Ford F150 Dual-fuel 2WD (LPG) good on gas?
At up to 15 MPG combined, the 2004 Ford F150 Dual-fuel 2WD (LPG) is worse than average for a Standard Pickup Trucks 2WD — that class averages about 17.3 MPG across 1,486 EPA-tested versions, so it's on the thirsty side for its size.
Real-world MPG vs the EPA number
The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.
This 2004 model was originally EPA-tested under the pre-2008 2-cycle method, which didn't account for highway speeds over 60 mph, air-conditioner use, or cold starts. When EPA overhauled the test for model year 2008, city ratings fell by about 12% and highway by about 8% on average industry-wide — and EPA retroactively adjusted every 1984-2007 rating to the stricter standard so old and new cars could be compared fairly. The MPG above is already on that modern scale — the window sticker on this car when it was new likely showed a higher, pre-2008-method number.
For its most efficient trim, the EPA estimates about $4,150 a year in fuel (15,000 miles) — roughly $346 a month.
2004 Ford F150 Dual-fuel 2WD (LPG) trims & fuel economy
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr (today's price) |
|---|---|---|---|
| 5.4L 8-cyl, Automatic 4-spd, RWD | FLEX-FUEL | 15 | $4,150 |
2004 Ford F150 Dual-fuel 2WD (LPG) specs
What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.
| Engine options | 5.4L 8-cyl |
| Transmission | Automatic 4-spd |
| Drive type | RWD |
| EPA body class | Standard Pickup Trucks 2WD |
| Fuel | Flex-fuel |
Other years of the Ford F150 Dual-fuel 2WD (LPG)
Similar cars (Standard Pickup Trucks 2WD)
Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides
1 trim(s) · EPA FuelEconomy.gov data retrieved 2026-07-24 · fuel prices AAA national average as of 2026-07-05.