Forester e-Boxer fuel consumption: impact of the outside temperature

Finally outside temperature is above twenty Celsius degrees! Some months ago I made a fuel consumption test in cold weather trying to achieve low fuel consumption but still driving in a real world situation.

Test route was roughly 60 km long, speed varying from 50km/h to 80km/h. Some traffic lights and stops during the trip.

On the first test round outside temperature was near 0 degrees. Already then I decided to do this same test again in warmer weather to understand how the temperature affects to fuel economy.

Round 2

Route is exactly same as on previous round. Reset trip meter before starting the test. Couple days ago I did fuel my car and had quite many short distance journeys. Car estimated 410 km cruising range. This kind of range is like from some electric car.

Estimation was due to my short distance driving. I am sure that once I return from the trip, cruising range will be somewhat same as it is now before starting test.

Fuel economy

After resetting the trip meter it takes a while before new readings comes. Quickly after some driving fuel consumption shows under 6 liters per 100 km.

Continuing trip readings drops significantly to 4,7 liters per 100 km. This sounds too good to be true. But that was in quite early part of my test. There was no traffic lights and not too many other cars blocking my way.

But then there started to be others on the road too and some traffic lights came into game too. Fuel consumption jumped to over 5 liters per 100 km.

So even the route was exactly the same, there was different amount of other cars on road. And then obviously I could have few stops more in red lights compared to first test session.

Luckily driving distance is long enough, so I think these tests are comparable with each other.

Fuel consumption went above and under 5 liters and it was exciting to see if I manage to have it under 5 liters at the final destination.

e-Boxer fuel consumption results

The final result was indeed 5 liters per 100 km. Onboard computer showed 4,9 liters as for the average consumption. That is 48 US MPG! Very well for such big and boxy car!

Of course this is not everyday fuel consumption, as you can also see from my long term data. But this test shows that it is possible to get decent figures with the Subaru Forester e-Boxer.

And what comes to that cruising range. Before starting the test it was 410 km. 60 km later it was 590 km. So onboard computer recalculated cruising range during the trip. Bit confusing and not that informative for the driver if range estimation can change so drastically.

Video of the test

I made also a short video of the test. Video is available on Youtube. Please remember also to subscribe the channel!

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