It is very interesting topic to discuss about the Subaru’s first hybrid Forester fuel consumption or MPG if you will. Just looking at the official WLTP numbers, it seems that Subaru did not make super efficient car. Combined WLTP fuel consumption is 8,1 litres per 100 km. Bear in mind that this is done in certain temperature and official WLTP cycle just little over 20 kilometers. So driving in different temperatures, it is expected to have different results. Of course, colder it is, worse the fuel economy will be. Tank capacity is 48 liters. Depending of your driving style and conditions, cruising range is somewhat 500 km.
Winter fuel consumption with the Forester e-Boxer
Fuel I use is 95 octane E10 (max 10% of ethanol). My Forester is equipped with Continental Viking Contact 7 winter tires (non studded). Tires will give own “spice” to consumption. My usual driving pattern is roughly 8 km trip to work. It is far from optimal for the car. Actually it might be even near worst possible. Lot’s of cold starts for the engine does not make good for the car nor for the fuel consumption. Every now and then I have to travel during office hours. So there I will have long distance driving. Then of course during leisure and weekend trips, with my family, consists both short and long distance driving. So this in mind I will predict the whole year consumption to be 9 liters per 100 km. This is only a guess or assumption at this stage. I will update this blog post at least every month with new consumption figures. At the end of year we should have a nice table of the Subaru Forester e-Boxer fuel economy. So, please remember to check this blog every now and then!
This was only half month what comes to the driving. I received car mid January, brought it to home from the dealership. First 500 km was long distance driving. Speed limits from 60 to 100km/h. During that trip fuel consumption was 7.1 liters per 100 km. Outside temperature was few degrees over 0 Celsius by then. Next I had some short distance driving. To work, back to home, to the grocery shop, etc.. That increased consumption to 8.4 liters per 100 km. Few longer work trips via a highway. Some city driving with lot’s of traffic lights. Total 1478 km distance driven. Average temperature for January +3 Celsius (Helsinki) and average consumption was 8.2 liters per 100km.
February started with a bit colder temperatures. That was shown as slightly increased fuel consumption. Nothing major. On this month I decided to do a “hypermiling test“. My goal was to beat official WLTP figures. Test went quite fine indeed, given that it was conducted during winter time. Result for that 60km test was 5.7 liters per 100km.
During this month GPF orange warning light lit also. Luckily I managed to get rid of that driving in certain conditions. Please check separate post of it.
Otherwise February included some driving through storm, some longer business trips and then short distance driving between home and office. Roughly 400km more than in previous month. From weather wise this month was bit colder than January, average of 1.4C. We saw even a glance of snow.
March started with some business related trips, which generated kilometers to the odometer. However from mid month we got advise from the employer to stay home and quickly after also from the government similar advises due to the domestic (and global) virus issue. So in March it seems that there is less distance driven and in general shorter distance driving, which increases fuel consumption.
Summer tires was changed on 24th of March. So that is also interesting to see how those will affect to the consumption. Winter tires are inch smaller than the original 18″ wheels.
I would assume that upcoming summer months will have still lower consumption figures. Bigger tires will increase consumption but warmer weather does have a greater impact. Thus lower fuel consumption is expected.
Final fuel consumption figures of March coming soon.
|Month||distance driven (km)||liters / 100 km||US MPG||UK MPG||Avg. outside temp.||Tyres|
|January||1478||8.2||28.7||34.5||+3C / 37.5F||winter|
|February||1843||8.3||28.3||34||+1.4C / 34.5F||winter|