The size of your Jeep Wrangler’s gas tank will be different depending on whether you have a two-door model or one of the four-door Wrangler Unlimited models.

Written by Cameron Thiessen

Reviewed by Kathleen Flear

Updated on Jan 31, 2024

Table of Contents

How big is the gas tank on a 2020 Jeep Wrangler?
How to check your 2020 Jeep Wrangler’s gas tank size
How to save on fuel costs in a 2020 Jeep Wrangler
How to optimize your 2020 Wrangler’s insurance coverage

The 2020 Jeep Wrangler came in two main sizes: the regular two-door Wrangler and the four-door

Unlimited

. The two-door wranglers have a 17.5-gallon fuel tank, while the gas tank on the Wrangler Unlimited is 21.5 gallons.

If you’re driving a Jeep Wrangler, you’re probably not saving all that much on your fuel consumption, making budgeting and rationing valuable virtues. If you want to track your fuel consumption and transportation costs, it can be really helpful to know exactly how much gasoline needs to go into your Wrangler’s gas in order to fill it all the way.

You could find this information in your owner’s manual, but we know you knew that already—you’re clearly here because you’d much rather get your Jeep Wrangler gas tank tips from

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How big is the gas tank on a 2020 Jeep Wrangler?

How big your 2020 Jeep Wrangler’s gas tank is depends on how many doors it has.

The two-door Jeep Wrangler models have a gas tank that holds 17.5 gallons, while the four-door Wrangler Unlimited has a larger gas tank with a fuel capacity of 21.5 gallons.

How to check your 2020 Jeep Wrangler’s gas tank size

Perhaps you’d like to confirm your 2020 Wrangler’s gas tank size by some other means. Well, honest, but here are some alternative ways you could sus out your Jeep’s fuel capacity.

Measure the gas tank

Might we interest you in some math?

Math is a great way to figure out how big things are! If you want to calculate the volume of your vehicle’s gas tank for yourself, you could always just measure its exterior dimensions—length, width, and height—with your handy-dandy tape measure. Next, multiply them together to get a volume measurement in cubic inches (if you used inches to measure initially).

Since there are 231 cubic inches in a gallon, you can then divide the result by 231 to arrive at the volume in gallons. Here’s a helpful formula similar to ones you may have seen the last time you took a math class.

W x L x H = V

V(cu in)(1 gal/231 cu in) = V(gal)

Is all this math sounding like a lot of work? We hear you! Moving on…

Check your owner’s manual

Remember that time earlier in this article when we mentioned our old pal, the legendary owner’s manual? Well, we’re going to mention it again! Your owner’s manual is your best source for information on your particular vehicle! Check your manual for its fuel capacity spec.

Drive till empty, then fill it up

If you haven’t got time for doing math or reading a book, you’re not alone. But luckily, we have a great idea that you can use to estimate your 2020 Jeep Wrangler gas tank size: drive your Jeep until it’s on empty—or as close as possible without draining the engine completely—and then just fill it up, taking note of how much fuel was required to fill it from empty to full. Now we’re talking efficiency.

MORE:

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

How to save on fuel costs in a 2020 Jeep Wrangler

One obvious way to save money on transportation costs for your 2020 Jeep Wrangler is by driving one of the models with a mild-hybrid engine.

If you already have a model that isn’t a hybrid, that piece of advice will be totally unhelpful to you, but wait! We have even more tips:

Keep up with maintenance. Keeping up with

regular maintenance

ensures your SUV is always in tip-top shape, optimizing overall performance, including fuel economy.

Drive carefully. The more aggressively you accelerate, the more gas you’ll use up. Especially when driving in the city, practice calm and calculated acceleration—not too fast, not too slow—to save money on fuel.

Avoid idling. A mild-hybrid will stop idling from being an issue, but since we’ve already established that you don’t have the hybrid engine, you’d do well to not leave the engine you do have in your Jeep running and burning gas while remaining stationary, effectively wasting a precious resource.

How to optimize your 2020 Wrangler’s insurance coverage

Fuel costs are a great place to optimize transportation savings, but if you’re looking for an even easier way to save your vehicle’s costs, we have the answer: using the

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car insurance

After you download the

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Jerry makes it easier than ever to shop and set up your new insurance policy, and we’re proud to report that our users save more than $800 a year on average, thanks to Jerry-approved savings on their car insurance premiums.