Canadian Mileage / Fuel Efficiency - 5th Gen Subaru Impreza Forum
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post #1 of 15 (permalink) Old 02-23-2018, 02:08 PM Thread Starter
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Canadian Mileage / Fuel Efficiency

How fuel efficient has your '17/'18 Impreza been so far?

Year, model, transmission, city/hwy, driving style:

'17 Impreza Sport-Tech hatch, CVT, mixed city/hwy, mixed driving style depending on traffic.

The car has been averaging anywhere between 10L/100km to 14L/100km since new. I've tried granny driving, easing into stops, and tires are always inflated to spec, etc. I never see 6-8L/100km. At some points, it even reaches into the 20L/100km range for sustainable amounts of time. Took it to the dealer while it was in for a regular maintenance, and they took a look. They said it was driver & weather related, nothing wrong with the car.

I wonder if this recall affects it at all:

https://static.nhtsa.gov/odi/rcl/201...7V216-3434.pdf

https://www.nhtsa.gov/vehicle/2017/S...DR/AWD#recalls

https://www.impreza5.com/forum/146-5t...iator-fan.html

We bought this car partly because of the advertised excellent fuel efficiency, especially with the added incentive of an even more thrifty CVT vs the manual, but we are consistently getting less than 450km/tank. Were we wrong in expecting 500-600km / fill up? It's left us puzzled & unImprezed on such a small car that is also a Partial Zero Emission Vehicle. Where's all the fuel going?

According to driving.ca, the CVT hatch should be around 8.5L/city & 6.4L/hwy:

First Drive: 2017 Subaru Impreza | Driving

As far as CVTs go, this is one of the better ones, and does a fairly good job of emulating a traditional stepped automatic when the paddle shifters are employed. The benefit, of course, is improved fuel economy. The hatchback with CVT is rated 8.5 L/100 km in the city, 6.4 L on the highway; with the manual, itís rated at 9.5 L and 7.0 L. We averaged around 8.4 L/100 km.
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'17 Impreza Sport-Tech
'90 4A-GE, '00 1ZZ-FE
'88 VW MKII, '88 Datsun

R.I.P. LM. 05/13
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post #2 of 15 (permalink) Old 02-24-2018, 07:46 AM
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during the winter months I was 13mpg. but I have to I wasn't driving the much,
so take it out for a long run once an while.
since it got the mileage is starting to get better,
I live in rhode island.

Last edited by skycomag; 02-24-2018 at 07:48 AM.
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post #3 of 15 (permalink) Old 02-26-2018, 12:49 PM Thread Starter
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I was wondering if the cold weather was affecting it, but it shouldn't factor in that significantly. In any case, the less than ideal fuel consumption has been the same since we purchased the car, and drove it through spring, summer, fall, and now winter.

I just wanted to compare to other Imprezas to see if it's normal/expected, or if I should have Subaru take a look at the car again.

Disappointed so far. Having to refuel so often, that the gas bar attendants are going to know us on a first name basis sooner than later. Hopefully it gets better.


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'17 Impreza Sport-Tech
'90 4A-GE, '00 1ZZ-FE
'88 VW MKII, '88 Datsun

R.I.P. LM. 05/13
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post #4 of 15 (permalink) Old 02-26-2018, 03:24 PM
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17 Sport Hatch, CVT, 50/50 highway and city
Mine averages 33 according to the screen, but I measured it and it is closer to 30. I do have my tires inflated pretty high though at 45 psi, but I have a heavy foot Overal my model gets fairly good gas milage, and if I drove more conservativly, I feel like I coud reach the advertised numbers (like when I am driving 40mph I can hold 50mpg without loosing speed). Try making your information screen show the current gas milege, it helps me recuce gas consumption.
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post #5 of 15 (permalink) Old 02-27-2018, 04:54 PM Thread Starter
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I'm an oldschool guy, love my -1980's cars. I hate looking at the all fancy gauges while trying everything to save fuel now, bc it takes away from enjoying the drive. And since that doesn't seem to improve anything, I find myself driving it the way I like now, bc the car is actually quite fun to toss around.
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'17 Impreza Sport-Tech
'90 4A-GE, '00 1ZZ-FE
'88 VW MKII, '88 Datsun

R.I.P. LM. 05/13
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post #6 of 15 (permalink) Old 02-28-2018, 05:40 PM
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My fuel efficiency is definitely worse in the winter with my snow tires on, but I still get better than 10L/100KM.

I monitor my fuel economy like a hawk and I'm around 9.2 to 8.5 this winter season. During the summer, I was around 8.3 to 7.7.

I'd bring it into the dealer to get it checked out if you're getting 14. That's nuts.
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post #7 of 15 (permalink) Old 03-05-2018, 11:30 AM
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I bought my 17 sport with cvt in November. I am averaging around 9.8l per 100km. Mine is about 50/50 driving. Last trip I went on, I drove at the speed limit and still only averaged 8.5. I will be bringing this up to the dealer when I go back. I'll wait to have my regular tires back on it.

Also a side note, what is displayed is a false number. When I checked it last it was off by about .5 l/100km
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post #8 of 15 (permalink) Old 03-05-2018, 08:21 PM
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It's at best an estimate, but then again so is relying on everything to be consistent from pump to pump. Ideally you'd only ever fill up at the same pump for your calculations. Figure out how close it is to doing the math yourself, and then you can probably stop bothering doing the math.
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post #9 of 15 (permalink) Old 03-07-2018, 07:52 AM
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Mine uses 9.3L/100km, mainly on 80km/h road and some stops. If i use 95RON, it will drop to around 7.8L/100km. i think the best way is to try a higher octane petrol.
2017 impreza sedan 2.0i-L CVT

2.0i-L Grey Sedan
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post #10 of 15 (permalink) Old 03-22-2018, 09:40 PM
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This was the average from the last 9000kms

Tires - Blizzak WS80
Fule - Regular 87 Octane
Tire Pressure - Front 34psi, Rear 33 psi
Driving - 70% highway 30% city
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