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RV mpg by class

Fuel is often the second-biggest cost of an RV trip. Here is what the published figures say, and why you will rarely find an official EPA number.

Published ranges

ClassTypical weightFuel economy
Class A (bus-style)Class A 20,000–50,000 lb; Class C 10,000–14,000 lb; Class B 6,000–8,000 lb1around 8–10 mpg1
Class C (cab-over)usually 10–14 mpg1
Class B (campervan)approximately 18–25 mpg1

These ranges come from Cruise America, which rents Class C motorhomes. all Cruise America rental vehicles run on gasoline2. The calculator pre-fills the low end of each range so that you do not under-budget; change it if your rental lists its own figure.

Why there is no EPA sticker

EPA fuel-economy labels cover light vehicles. According to fueleconomy.gov, cargo vans over 8,500 lb GVWR and passenger vans of 10,000 lb GVWR or more are exempt from EPA fuel-economy testing3. Most motorhomes are built on chassis heavier than that, so they have no official mpg rating.

How big is the tank?

Cruise America lists average tank sizes: Class A 80 US gallons, Class B 24, Class C 551. Divide the tank size into your daily miles to see how often you will stop.

Work out your own trip: open the RV rental calculator. It starts with sourced defaults and leaves the rest for your quote.

Sources

  1. Cruise America, How much fuel does an RV consume. Checked October 31, 2026. The page is undated; its fuel-price examples are stated as of 23 June 2023.
  2. Cruise America, RV Rental FAQs. Checked October 31, 2026.
  3. fueleconomy.gov (EPA/DOE), Which Vehicles Are Tested. Checked October 31, 2026.