What Is the Capacity of a Car’s Gas Tank?

Kirill November 11 2022

Average Car’s Gas Tank capacity

The size of your car's gas tank varies depending on the vehicle. Smaller cars have tanks that can hold about 12 gallons, while larger vehicles may be able to fit 15 or more gallons.

It’s important to know that the number of miles per gallon (MPG) does not directly correlate with a smaller or larger gas tank. A bigger tank just means you can go further before having to refuel, but it won't necessarily affect how many miles per gallon your car gets.

Not only that, but a bigger gas tank will also mean more weight. Instead of opting for a large tank, it might be better to make it smaller and improve the MPG slightly. To get better fuel efficiency, you’ll want to keep the weight down as much as possible

Size of an Average Gas Tank

Most gasoline tanks can hold between 13 to 16 gallons. For example, a Ford Focus can store 13.5 gallons of gas, a Hyundai Elantra 14 gallons, and a Mazda 3 can hold between 14.9 and 15.9 gallons of gas, depending on the model.

Reserve Tank capacity

Most cars' low fuel warning light will come on when the gas in the tank reaches levels near the reserve. The average amount of fuel considered "reserve" is between 10-15%.

Fuel Capacity vs. Size of the Engine

An engine's interior space for gasoline and air generally determines its size. The volume (interior space) in an engine’s cylinders is used to estimate the size of your engine. Here, the mixture of air and fuel ignites to generate the energy required to turn the wheelsThe shared volume among all cylinders constitutes the engine’s overall size.. The number of cylinders in an ENGINE varies greatly, from two up twelve. We have even seen cars with 16 cylinder engines


Gas Tank Capacity of a Smart Car

Smart cars have many great features, such as being inexpensive, fuel-efficient, and dependable. They also weigh 700 pounds less than almost any other American vehicle. In addition, they gas mileage is excellent; most Smart cars can go around 40 miles per gallon.

One might assume that since the size of a Smart car is smaller than average, the fuel tank would be small as well--and you'd be correct. Most models of Smart car only come with an 8.7-gallon tank.

Gas Tank Capacity of a Race Car

A race car's gas tank typically stores 22 gallons of gasoline, which comes from a central reservoir to stop teams from adding any chemicals. The standard petrol cans used to refill these cars can hold up 11 gallons each and weigh approximately 70 pounds once full.