Why the Ram 3500 has no EPA mpg rating

EPA fuel economy ratings, the city, highway and combined mpg figures on a window sticker, come from federal testing that does not include heavy-duty trucks. FuelEconomy.gov answers this question directly: vans, pickup trucks and SUVs weighing more than 8,500 pounds gross vehicle weight are classified as heavy-duty vehicles, fuel economy regulations do not apply to these vehicles, and so they are not tested.

The same site defines truck size classes by gross vehicle weight rating (GVWR), which it describes as the weight of the vehicle plus its carrying capacity. Its standard pickup class tops out at 8,500 pounds GVWR.

From FuelEconomy.gov, Frequently Asked Questions (Why don't you have ratings for large vans, pickup trucks and SUVs?; How are vehicle size classes defined?), read November 4, 2026.

Ram 3500 GVWR by engine (2027 model year)

Ram's preliminary 2027 Ram 3500 Heavy Duty towing charts list each cab, box, drive and axle configuration. Every one is above the 8,500-pound line:

Ranges across all configurations in the 2027 Ram 3500 Heavy Duty preliminary trailer towing charts (Stellantis Media, PDF dated May 19, 2026), read November 4, 2026. These charts are marked preliminary; the GVWR for a specific truck is on its own label and window sticker.

How to track your own Ram 3500 fuel economy

Without an EPA number, the best mpg figure is your own truck's. Ram heavy-duty trucks with the Fuel Economy display can show it in the instrument cluster. The 2022 Ram 2500/3500 Owner's Manual says to push the up or down arrow button until the Fuel Economy menu item is highlighted, and that the screen shows a current fuel economy gauge, an average fuel economy value and range to empty. Push and hold the right arrow button to reset the average.

Reset the average at the start of a tank or a trip and you will see what your mix of driving, loads and towing actually returns. Menu names can change between model years, so check the manual for your truck.

From the 2022 Ram 2500/3500 Owner's Manual (Fuel Economy, If Equipped; HTML edition), read November 4, 2026.

Towing, payload and fuel

The reason people buy a Ram 3500 is capability, and the weight ratings show it: in the 2027 preliminary charts, the 6.7L Cummins HO configurations list maximum trailer weight ratings up to 37,020 pounds and the 6.4L HEMI configurations up to 18,140 pounds. For the full breakdown, see our Ram 3500 towing capacity guide.

Diesel models also use diesel exhaust fluid; see our Ram HD DEF guide and, for winter, our Cummins diesel cold-weather guide.

From the 2027 Ram 3500 Heavy Duty preliminary trailer towing charts, read November 4, 2026.

Ram 3500 at Elgin CDJR

See the new Ram 3500 at Elgin CDJR, or bring your heavy-duty Ram to our Ram service center. Schedule service or see our service specials.

Our service department is open Monday to Friday 7 a.m. to 7 p.m. and Saturday 7:30 a.m. to 4 p.m., and is closed Sunday. Elgin CDJR is at 1500 W. Lake St. in Streamwood. Get directions.