Impreza fuel economy, canadian "winter gas" is back

[Charlez]

It happens each and every years, my fuel consumption decrease sharply in
November.

For example, my 2000 Impreza was getting 620km per tank (385milles) or 29mpg
In winter, I can get about 550 km per tank (340 milles) or 26mpg

The thing is that I drive the same route at the same speed, I always
monitor my fuel consumption over the same route.

Last week, I had an even more interesting expetience:
I filled my tank in Quebec city and I manage to get 535 km before going on
the reserve (330 milles) I did average about 23.5mpg (US gal) or 10L/100km,
I below than average score, even for winter
I filled up again near Ottawa and this tank gave me 645km before I went on
the reserve I did average 8.7L/100km or 27mpg

It is a 13% difference.

This summer, my fuel economy never went below 27mpg unless I did major city
driving and I really notiver when I do not hit 600km per tank

My guess, the Winter gas has arrived in Quebec and not in Ontario.

Charles Leblanc
2000 Impreza 2.2l 5spd

 

[Hiver]

It happens each and every years, my fuel consumption decrease sharply in
November.

For example, my 2000 Impreza was getting 620km per tank (385milles) or 29mpg
In winter, I can get about 550 km per tank (340 milles) or 26mpg

The thing is that I drive the same route at the same speed, I always
monitor my fuel consumption over the same route.

Last week, I had an even more interesting expetience:
I filled my tank in Quebec city and I manage to get 535 km before going on
the reserve (330 milles) I did average about 23.5mpg (US gal) or 10L/100km,
I below than average score, even for winter
I filled up again near Ottawa and this tank gave me 645km before I went on
the reserve I did average 8.7L/100km or 27mpg

It is a 13% difference.

This summer, my fuel economy never went below 27mpg unless I did major city
driving and I really notiver when I do not hit 600km per tank

My guess, the Winter gas has arrived in Quebec and not in Ontario.

Charles Leblanc
2000 Impreza 2.2l 5spd

I live in Quebec and notice that my gas consuption changes depending
witch gas station I go to. You are lucky to get 600km, I get 400/450
when I it the reserve, I have a Forester 2004.

 

[Charlez]

I live in Quebec and notice that my gas consuption changes depending
witch gas station I go to. You are lucky to get 600km, I get 400/450
when I it the reserve, I have a Forester 2004.

I am not lucky, I am thame

I always calculate my fuel economy on trips where I drive mostly on
highways. This is not representative of a real world mixed driving
condition but it is easy to reproduce and it gives me a good idea of the
fuel economy of my car

On the highway, I set my cruise control to 115km/h ... 72mph. I also
check my tire pressure on a regular basis

I am running synthetic oil for the engine and the gears, I also installed
Iridium spark plugs lately. Both changes did improve the fuel economy by
5-7% on my car.

On City driving, I get 400km per tank but I drive the car much harder.

It is normal that the 2000 Impreza would get better milleage than the
Forester. It is smaller, has a smaller engine, has a lower weight and has
smaller and stiffer tires. As far as aerodynamic drag, the real drag is
the SCx, the S is the fromtal area and the Cx is the drag coefficient. The
drag area of the Impreza is lower than average but the frontal area is much
lower than many new SUV of hight aspect station wagon.

Charles Leblanc
Impreza 2000

 

[Vincent Reppucci]

doesn'twinter gas have a different blend form summewr gas?? I also notice
about a 10% drop in CT from Nov through Marchwhich I blame on the
reformulation of winter (more volatile) gas. I believe now in CT there has
benn some etoh added.

Anyone out there know more about this???

Vincent