2018 Subaru Crosstrek Gas Tank Size

Every 2018 Subaru Crosstrek has a gas tank capacity of 16.6 gallons. Here are the details.
Written by Amber Reed
Reviewed by Jessica Barrett
The 2018 Subaru Crosstrek has a gas tank capacity of 16.6 gallons across all trim levels and configurations. 
The ad campaigns tell us that love is what’s in a Subaru, but have you ever wondered how much gas is in there as well? If you’re curious about the gas tank capacity of your 2018 Subaru Crosstrek but can’t find your manual, you’re in the right place. 
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How big is the gas tank on a 2018 Subaru Crosstrek?

The 2018 Subaru Crosstrek is a fun and friendly compact SUV that has room for five, all-wheel drive, and a free-spirited, adventurous vibe. There was just one engine available in the 2018 Crosstrek—a 2.0-liter, flat four-cylinder set-up that was fueled from a gas tank with a capacity of 16.6 gallons. All-wheel drive was standard, and the choice of an automatic or a manual transmission was offered. 

How to check your 2018 Subaru Crosstrek’s gas tank size

If you want more information or you’d just like to verify this number, there are a few different other ways that you can determine the size and capacity of your gas tank.

Measure the gas tank

If you can easily access the gas tank in your Subie, you can measure it and calculate its capacity at home. Determine the width, length, and height of the tank in inches (a measuring tape works best for this), and then multiply those figures together. This will give you the tank’s size in cubic inches. 
Now divide that by 231 (how many cubic inches are in a gallon), and there you go! The capacity in gallons. 

Consult the owner’s manual

If you do still have your owner's manual, then you can double-check your work by looking up the gas tank capacity in there. It should be under a section called “capacites”, “specifications”, or something similar. 

Drive until the tank’s empty, then fill it up

If the previous two methods are a little dry and science-y for you, then you can explore your tank’s capacity in real time by driving until your fuel gauge reads empty, then filling it up. Just be cautious that you don’t push your luck on empty for too long, lest you wind up doing the walk of shame to the nearest gas station. 
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How to save on fuel costs in a Subaru Crosstrek

The 2018 Subaru Crosstrek has a combined fuel economy rating of 25 mpg for a manual transmission, and 29 mpg for an automatic. But no matter what your transmission is, here are a few tips to help you save on your fuel consumption and costs:
  • Don’t skip routine maintenance. Making sure you perform routine maintenance and repairs may be a bit of a pain, but a properly-maintained car will get better fuel economy (and have a longer life span). 
  • Accelerate with care. Going easy on the gas pedal will not only keep your fuel consumption on the low end, but it might also save you a ticket!
  • Avoid idling, particularly when it’s cold. Idling is a big waste of gas (and is bad for the environment), so try to keep your idling to a minimum—especially when it’s cold out. 

How to get great coverage for your Crosstrek

The Crosstrek (like most Subarus) is ready for adventure, and making sure you have the right
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