Vehicle comparison
Ford F-350 Super Duty (Diesel) vs Ram 3500 (Cummins Diesel)
Side-by-side fuel and ownership cost comparison. Estimates use 12,000 mi/year at average US gas prices.
- Updated for 2026
- EPA-style MPG
- US avg fuel prices
- US units
- Transparent assumptions
Lowest running cost
Ford F-350 Super Duty (Diesel) wins on fuel cost
At 12,000 miles per year, the Ford F-350 Super Duty (Diesel) costs about $3080 per year, roughly $0 less than the Ram 3500 (Cummins Diesel). Over 5 years, that's about $0 in fuel savings.
Spec & cost comparison
MPG/MPGe figures are estimates based on typical recent model years.
| Spec | Ford F-350 Super Duty (Diesel) | Ram 3500 (Cummins Diesel) |
|---|---|---|
| Type | TRUCK | TRUCK |
| Fuel | Diesel | Diesel |
| City MPG/MPGe | 14 | 14 |
| Highway MPG/MPGe | 18 | 18 |
| Combined MPG/MPGe | 15 | 15 |
| Tank / Battery | 34 gal | 31 gal |
| Energy cost | $3.85/gal | $3.85/gal |
| Cost per mile | $0.257 | $0.257 |
Annual cost at 8k / 12k / 15k miles
Estimated yearly fuel spend at common US mileage levels.
| Miles/year | Ford F-350 Super Duty (Diesel) | Ram 3500 (Cummins Diesel) | Difference |
|---|---|---|---|
| 8,000 | $2053/yr · $171/mo | $2053/yr · $171/mo | $0 (Tie) |
| 12,000 | $3080/yr · $257/mo | $3080/yr · $257/mo | $0 (Tie) |
| 15,000 | $3850/yr · $321/mo | $3850/yr · $321/mo | $0 (Tie) |
Estimates only. Real costs depend on driving style, terrain, local gas/electricity prices and weather.
Which one is best for…
Best for commuting
Ford F-350 Super Duty (Diesel)
Highest combined MPG/MPGe and lowest cost per mile means cheaper daily driving.
See Ford F-350 Super Duty (Diesel)Best for road trips
Ford F-350 Super Duty (Diesel)
Better highway efficiency, larger tank/battery and longer range between stops.
See Ford F-350 Super Duty (Diesel)Best for families
Ford F-350 Super Duty (Diesel)
SUVs, minivans and three-row vehicles win on space and child-seat flexibility.
See Ford F-350 Super Duty (Diesel)Best for lowest running cost
Ford F-350 Super Duty (Diesel)
Cheaper energy use and lower cost per mile at every common mileage tier.
See Ford F-350 Super Duty (Diesel)How we compare these vehicles
- Annual mileage
- Modeled at 12,000 mi/yr unless a scenario specifies otherwise.
- Cost per mile
- $/gal ÷ MPG, or $/kWh ÷ (MPGe ÷ 33.7) for EVs.
- EV vs gas
- Compared at average US gas and residential electricity prices — fast-charging can be 2–3× higher.
- Maintenance
- Fuel cost only — EVs typically save another $400–$1,000/yr in service and brake wear.
Sources & assumptions
- EPA fuel economy data — City / highway / combined MPG and MPGe baselines.
- U.S. Department of Energy (fueleconomy.gov) — Vehicle efficiency and EV range references.
- AAA gas price trends — Recent national and regional retail fuel averages.
- EIA electricity rates — Average residential per-kWh prices used for EV charging.
We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.
Frequently asked questions
Which is cheaper to drive, the Ford F-350 Super Duty (Diesel) or Ram 3500 (Cummins Diesel)?
At 12,000 miles per year, the Ford F-350 Super Duty (Diesel) costs about $3080 per year vs $3080 for the Ram 3500 (Cummins Diesel) — roughly $0 less per year.
What's the MPG difference between the Ford F-350 Super Duty (Diesel) and Ram 3500 (Cummins Diesel)?
The Ford F-350 Super Duty (Diesel) is rated around 15 combined MPG versus 15 MPG for the Ram 3500 (Cummins Diesel). Highway figures are 18 vs 18.
How much will I spend on fuel over 5 years?
Driving 12,000 miles a year for five years, expect about $15400 for the Ford F-350 Super Duty (Diesel) and $15400 for the Ram 3500 (Cummins Diesel), a difference of roughly $0.
Is the Ford F-350 Super Duty (Diesel) or Ram 3500 (Cummins Diesel) better for commuting?
For pure cost per mile, the Ford F-350 Super Duty (Diesel) wins. EVs charged at home typically deliver the lowest commuting cost, followed by hybrids and efficient compacts.
Which one is better for road trips?
Ford F-350 Super Duty (Diesel) is generally the better road-trip choice — gas and hybrid vehicles win on long highway routes thanks to faster refueling, while EVs work best when charging stops fit your route.
Are these fuel cost numbers accurate for my driving?
They're estimates based on EPA-style combined MPG and average US gas prices. Real-world cost depends on local fuel prices, driving style, terrain, weather and how much city vs highway driving you do.