Although it’s available in lots of configurations with different bed lengths, cab sizes, and drivetrains, the 2021 Ram 1500 Big Horn has just two gas tank options. One holds 23 gallons while the other holds 26 gallons.

If you want to know which size of tank your truck has, this guide will break it down for you and show you how to verify the measurement for yourself.

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How big is the gas tank on a 2021 Dodge Ram 1500 Big Horn?

The 2021 Ram 1500 came with two gas tank sizes—a 23-gallon tank and a 26-gallon tank. But how do you know which one is on your truck?

It’s actually pretty easy. All configurations that have the crew cab have a 26-gallon tank. All models with the quad cab have a 23-gallon tank.

How to check your 2021 Ram 1500 Big Horn’s gas tank size

If you’re not convinced that your gas tank is 23 or 26 gallons, you can always double-check! There are a few easy ways to get a pretty accurate measurement of the Ram 1500 Big Horn’s fuel capacity.

Measure the gas tank

If you’re up for a project and aren’t afraid of a little math, you can measure the gas tank and calculate its fuel capacity yourself.

You’ll need to get a measuring tape and a calculator, and then crawl underneath your truck, right under the gas tank. Once there, measure the tank’s length, width, and height in inches. Take those measurements and multiply them together.

Once you have that figure, divide it by 231. That’s the number of cubic inches per liquid gallon. The result should be your gas tank’s fuel capacity!

Check your owner’s manual

If you have the owner’s manual, you should find your model’s specific fuel tank size there. If you’ve misplaced your manual, you can download a PDF version from the

Ram owner’s resource website

Drive till empty, then fill it up

It’s a little risky if you push it too far, but a simple way to figure out your fuel tank size is just driving until you’re on empty. Once the fuel indicator gets to E, fill up the tank and see how many gallons it can hold.

MORE:

How far can you drive on an empty tank of gas?

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How to save on fuel costs in a 2021 Ram 1500 Big Horn

Big pickup trucks like the Ram 1500 Big Horn aren’t exactly synonymous with fuel efficiency. However, the 2021 1500 Big Horn’s fuel economy is actually pretty good, thanks to the model’s passive hybrid technology. For instance, the four-door crew cab with a 5.6-foot bed and four-wheel drive manages to get a combined 21 mpg.

If you want to keep your vehicle running efficiently, there are a few steps you can take to get the most out of each gallon of gas:

Keep up with maintenance. Following a

regular maintenance schedule

helps to keep your pickup running as efficiently as possible. It also prolongs your truck’s longevity!

Drive slower. Staying at the speed limit and slowing down when you’re not in a hurry will help your truck to use less gasoline.

Don’t idle. When your pickup is parked, shut the engine off. Leaving it running wastes a lot of fuel.

How to optimize your Ram 1500 Big Horn’s insurance coverage

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