A newbie to the forum so please be gentle .... :biggrin:
Vehicle is a Forester 2.0D Premium - 6 speed manual, 22,000Km on the clock.
For my 2011 2.0D Subaru claimed just 5.7L/100km fuel economy on the open road and an average of 6.4L including around town.
I know we treat these figures with the contempt they deserve but in a laboratory somewhere they did it once .....
Fact is, I actually get 6.4l/100Km around town without much effort at all. Single passenger, no cargo and mild road rager. Am VERY happy with that.
Problem is, when I do a long highway trip, say 1,200Km at around 100 to 110Kph (GPS) with just a bag of clothes (not heavy denim) my fuel economy drops to almost 7.4l/Km (using cruise control).
These figures I am quoting coincide with what the car tells me but I keep a spreadsheet of every tank I use and it agrees with the car (as near as).
The car has no external options like roof racks, bull bars etc fitted - it is stock standard so the drag coefficient has not been modified in any way.
I always check tyre pressure with my own guage I carry, especially before any long trips. I use the vehicles pressures as a guide and then consult the tyre manufacturer (yokohama geolanders).
I tried changing the air filter (stock paper replacement first) which made no difference.
Firstly, has anyone else experienced this anomaly of better fuel economy around town? and
Secondly, where do I start looking for issues?
The vehicle was just in (prematurely) for its 25K service to Subaru. I mentioned it to them. They drove the car with analyser attached (OBDII) and couldn't see anything wrong.
Not sure what to do next
Have a 4,000Km trip coming up in two months. Would like to get it sorted beforehand as it could save me a few dollars in diesel.
Would love to hear some ideas (relating to this issue only thanks)
Vehicle is a Forester 2.0D Premium - 6 speed manual, 22,000Km on the clock.
For my 2011 2.0D Subaru claimed just 5.7L/100km fuel economy on the open road and an average of 6.4L including around town.
I know we treat these figures with the contempt they deserve but in a laboratory somewhere they did it once .....
Fact is, I actually get 6.4l/100Km around town without much effort at all. Single passenger, no cargo and mild road rager. Am VERY happy with that.
Problem is, when I do a long highway trip, say 1,200Km at around 100 to 110Kph (GPS) with just a bag of clothes (not heavy denim) my fuel economy drops to almost 7.4l/Km (using cruise control).
These figures I am quoting coincide with what the car tells me but I keep a spreadsheet of every tank I use and it agrees with the car (as near as).
The car has no external options like roof racks, bull bars etc fitted - it is stock standard so the drag coefficient has not been modified in any way.
I always check tyre pressure with my own guage I carry, especially before any long trips. I use the vehicles pressures as a guide and then consult the tyre manufacturer (yokohama geolanders).
I tried changing the air filter (stock paper replacement first) which made no difference.
Firstly, has anyone else experienced this anomaly of better fuel economy around town? and
Secondly, where do I start looking for issues?
The vehicle was just in (prematurely) for its 25K service to Subaru. I mentioned it to them. They drove the car with analyser attached (OBDII) and couldn't see anything wrong.
Not sure what to do next
Have a 4,000Km trip coming up in two months. Would like to get it sorted beforehand as it could save me a few dollars in diesel.
Would love to hear some ideas (relating to this issue only thanks)