Help! My 2017 Outback Gets Terrible Gas Mileage


I bought a used 2017 Subaru Outback touring, and from what I’ve been able to calculate, its actual gas mileage fluctuates between 15 and 18 mpg! Does anyone know what’s wrong with this car? This can’t be normal for a new model vehicle, even a V6.

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I seriously doubt there is anything wrong with the vehicle. If you are doing mostly city driving and it is winter time so the fuel usage will be lower than you expect. I assume you are checking the MPG the proper way. Also if you let your vehicle warm up in the morning that too will cause a lower reading. Have you checked it by pencil and paper on a highway trip at a reasonable speed ?

Edit: I guess I should mention that you do not have a V6 .


Are your tires at the proper pressure?


How are you figuring the fuel mileage and are you saying, highway, city, or a combination?

The EPA says 22 combined and any discrepancy could be easily due to a low tire or your foot.


I own a 2011 Outback with the same engine, which is actually an H-6. Subaru does not use any engines with a “V” configuration. But, to get to the point of the matter, I can tell you that my gas mileage with essentially the same vehicle is a consistent 23-24 mpg in local driving, except during periods of extreme cold, when my mileage can drop as low as 17-18 mpg.

That being said, if the Check Engine Light isn’t lit-up, then it is very unlikely that there is anything wrong with the car that could affect gas mileage. The most likely causes of poor gas mileage include the following:

Warming-up the engine for more than… maybe… 30 seconds before driving (Just drive conservatively until the engine is warmed-up)

Doing mostly short-trip, local driving (This is not good for the engine, or the battery, or the exhaust system, in addition to using a lot more gas.)

The way that you accelerate and brake (Learn to coast when you see a traffic light ahead turning red. Make believe that there is a raw egg between your foot and both of the pedals. The object is to press on the gas and the brake pedals so gently that you don’t break the egg’s shell.)

Not having your tires properly inflated (Do NOT rely on the car’s Tire Pressure Monitoring System. You need to manually check the tires with a hand-held gauge.)

Carrying excess weight around in the car (Some people carry things around that are not needed on a regular basis. Leave those excess items in your garage until you need to load them.)

Tailgating other cars. (People who tailgate have to hit the brake much more often, and then, after braking, they hit the gas again, thus ruining any chance at good gas mileage. Tailgaters use a lot more gas, as well as wearing out their brakes prematurely.)


a suv that gets 22mpg? how long have you owned it? done any longer trips? my suv gets 20 around town and 23 on the hwy. i was not expecting awesome mileage and it proved true. yes its empty. proper tire pressure. 2krpm at 60mph. i know any short trips during lunch time just kill the mileage. gotta stay put during the day


You obviously have a v4


The olds of a Subaru having a V-4 are zero. They’re all Boxer 4s or 6s.


Like OK4450 says , Zero chance of having a V4 engine . Also don’t see what that would have to do with terrible gas mileage .


You might want to check your tires and alignment. Some tires have much higher rolling resistance than others and a slight issue with alignment can cause a noticeable drop in fuel economy. I try to stick with tires that have lower rolling resistance and I have my alignment checked annually because I drive over 30,000 miles a year. With my snow tires on now I am getting about 30 to 31 mpg in my Mazda 6 with the 2.5 liter turbo engine (255 hp). My all season tires go on in a month and I expect to see a slight increase in mileage.


It appears that Carmen has left and why Patricia felt it necessary to post a wrong and vague comment is unknown .