Mazda 3 Gas Tank Size

Your Mazda 3 gas tank size depends on its model year and trim. The standard sizes are 12.7, 13.2, 14.5, and 15.9 gallons.
Written by John Davis
Reviewed by Jessica Barrett
Updated on Sep 14, 2022
Your Mazda 3 gas tank size depends on its model year and trim. However, most Mazda 3s will have 12.7, 13.2, 14.5, or 15.9 gallons of gas tank capacity. 
Although it probably isn't one of your favorite activities, filling your car up with fuel is something you can't avoid. As a car owner, knowing the size of your gas tank is a smart move. And this knowledge can really save you on long road trips.
Your vehicle owner's manual will contain this information, but if you don't have access to the manual or you've lost it,
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How big is the gas tank on a Mazda 3?

The Mazda 3 has been in production since 2003. Along with the model year, the trim determines what size gas tank your Mazda 3 has. Here’s how the sizes break down by model year:
  • 2003-2009 and 2012-2013: 14.5 gallons (or 55 liters)
  • 2010-2011: 15.9 gallons (or 61 liters)
  • 2014-2018 and 2022: 13.2 gallons (or 50 liters)
  • 2020-2021: 12.7 gallons (or 49 liters)
  • 2022 Sport CX trim: 11.9 gallons (or 45 liters)

How to check your Mazda 3's gas tank size

Do you like to verify things for yourself? Well, you can use a few methods to determine your vehicle's gas tank size. 

Measure the tank

This first method is ideal for someone who doesn't mind getting a little dirty. All you'll need is a measuring tape and a calculator.
To measure your Mazda 3's gas tank, multiply its length, width, and height. Divide that number by 231 (the number of cubic inches in a gallon) to learn your vehicle's fuel tank capacity. 

Check your owner's manual

If you'd rather not crawl underneath your car to measure your gas tank, a simpler method is to check your owner's manual. You can generally find this information labeled under a phrase like "fuel tank capacity."

Drive until empty, then fill it up

If you don't have an owner's manual and you don't feel like venturing under the car, there is one more method you can use to learn your vehicle's gas tank size.
This method involves driving your car until the gas gauge reaches empty. Plan for this in advance and ensure you end up near a gas station because the next step is filling the tank. 
Remember to pay attention to how many gallons of fuel you add to your car. This method won't give you an exact number, but it will be pretty close. 

How to save on fuel costs in a Mazda 3

Now that you know how big the gas tank is on your Mazda 3, you might be wondering if there's anything you can do to save some extra money on fuel. The Mazda 3 is a relatively fuel-efficient car. The number varies depending on the model year and trim, but the average MPGs are in the high 20s.
However, if you really want to optimize your Mazda's fuel efficiency, follow these steps:
  • Keep up on maintenance. Even if you only drive your car to and from work, regular use takes its toll on a vehicle. A great way to prolong the life of your car—and maximize fuel efficiency—is to keep up on regular maintenance, like oil changes and tire rotations.
  • Drive your Mazda carefully. If you try to leave the intersection or stop light as quickly as possible, you might be wasting gas. Ease up on the pedal—especially when accelerating—to increase your fuel efficiency. 
  • Don't let it idle for extended periods, especially during cold months. Allowing your car to idle excessively wastes fuel. Try driving your vehicle gently to warm it up in winter instead of letting it idle. 

How to optimize your Mazda 3 insurance coverage

If you take care of your Mazda, chances are it will last you for many years. One of the essential steps you can take toward protecting and caring for your vehicle is to purchase a good
car insurance
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