What Is the Average Size of a Gas Tank?

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What Is the Average Size of a Gas Tank?
The large variety of cars on the road causes variety in gas tank size. (What's the hurry image by andrus from Fotolia.com)

The size of a car's fuel tank represents the combined result of the car's fuel efficiency and the general standard that it travel between 350 and 400 miles on a single tank of fuel. The great variety of vehicles on the road causes a great variety of gas tank sizes.


Since they are smaller and therefore get better mileage, subcompact cars' gas tanks usually only hold 10 to 13 gallons of gasoline—enough fuel to propel them 350 to 400 miles.

What Is the Average Size of a Gas Tank?
Subcompact cars offer better gas mileage than that offered by other cars. (Red cars image by Catabu from Fotolia.com)

Mid-Size Fuel Efficiencies

Mid-size cars usually require 15 to 18 gallons of fuel to allow them to travel 350 to 400 miles on a full tank because they are heavier and less fuel efficient than subcompact vehicles.

What Is the Average Size of a Gas Tank?
Mid-size cars require a little more energy to move, since they are heavier than compacts. (car image by bright from Fotolia.com)

Larger Cars

Full-sized automobiles have gas tanks with a capacity of about 18 to 20 gallons, and SUVs, which don't offer good gas mileage, usually hold 20 to 30 gallons of gasoline.

What Is the Average Size of a Gas Tank?
Large cars need larger tanks. (classic beauty image by Leticia Wilson from Fotolia.com)

Average Tank Size

Because we drive many types of cars , and these have different efficiencies and so require various amounts of fuel to travel 350 to 400 miles, the average fuel tank holds around 15 to 18 gallons.

What Is the Average Size of a Gas Tank?
The variety of cars on the road results in result in differing fuel requirements. (highway gate image by Aditia Patria Warman from Fotolia.com)

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