Real world Impreza mpg comparisons
Discussion
MY00 classic wagon with Prodrive Performance Pack: 24.5mpg average over 18 months/10k miles.
On a long gentle run in the summer you can get 31-32mpg (rarely happens!). General running in winter (8 mile each way B-road commute) returns 22-23mpg. Worst I've ever had over the course of a tank was 19mpg and that was with gunning it constantly through the Highlands!
On a long gentle run in the summer you can get 31-32mpg (rarely happens!). General running in winter (8 mile each way B-road commute) returns 22-23mpg. Worst I've ever had over the course of a tank was 19mpg and that was with gunning it constantly through the Highlands!
MY05 Forester 2.5XT. Average 26mpg with mixed commute of town and A roads.
Only run on Momentum or V Power and found it does make a difference to mpg over 95ron.
With more torque available lower down the rev range I think the 2.5 has no mpg penalty against the 2.0 but is more flexible everyday.
Only run on Momentum or V Power and found it does make a difference to mpg over 95ron.
With more torque available lower down the rev range I think the 2.5 has no mpg penalty against the 2.0 but is more flexible everyday.
65 mile a day round commute: 16 miles A road (with rush hour crawl for 2-3) and the remainder motorway. Average 26-28mpg. 270-290 between fill ups depending on differing traffic conditions and motorway speeds. With other private travelling I burn two tanks a week 
I have a classic Turbo2000 unmodified.
I have a classic Turbo2000 unmodified.
P1 with newage 2.5 and 6-speed box, approx 450bhp
80 miles per day of mixed b-roads, a-roads and city driving, 180miles per tank (16mpg)
I don't tend to do any motorway cruising because it's a bit raucous but on longer a-road runs it can touch 250 miles to a tank (6th gear and 225x40r18 tyres help lower the final drive)
80 miles per day of mixed b-roads, a-roads and city driving, 180miles per tank (16mpg)
I don't tend to do any motorway cruising because it's a bit raucous but on longer a-road runs it can touch 250 miles to a tank (6th gear and 225x40r18 tyres help lower the final drive)
I keep an eye on MPG at every fill (I reckon it's a decent indicator of how well the car is running). Always brim the tank and run to the light. My average drive is about 25 minutes country A road (couple of 30mph villages) with moderate traffic and then 20 minutes city outskirts - 30mph stop/start.
I tend to commute with economy in mind, so avoid braking or aggressive acceleration. On the odd occasion I'll use WOT to pass a dawdler, but for the most part it's as sedate as can be. People often question me on why I bother with a Subaru if I just potter around with MPG in mind... well...because it can do the 'other' thing if I want it to. If I drove to work (20 odd miles each way) with my foot glued to the floor every day I'd not be able to justify it.
I've had two WRX wagons and got 3 distinct MPGs. These are calculated over about a year (20K miles) each!
Standard 2002 car: 27mpg
2005 car with PPP: 30mpg
2005 car with the modifications listed below: 33mpg
6mpg up from where I started.
A rare thing amongst Impreza owners, but I really prefer the response of a big V engine over a turbo. Even though the PPP pack brings a significant improvement at the lower end, it would still irritate me between 2,000 and 2,500rpm.... the sort of range where you just want a little throttle out of a corner to balance the car. After looking for a replacement (had to be a proper permanent 4x4 with an estate back not made by Audi... answers on a postcard) I decided to see if a little bit of tuning would sort it.
Had the standard up pipe, complete with pre-turbo cat removed and replaced with a ported item, replaced the primary cat with a pro-drive STI 200cell and then a remap to suit. The PPP map feels nice but it runs very rich at 3K5 and above, I guess for safety. It's now been leaned out a fair bit. The end result was exactly what I was after (was a little nervous I was going to chuck money at it and end up not getting what I wanted) - got a 50% torque increase at 2500rpm - also got about 20bhp at the top end.
I tend to commute with economy in mind, so avoid braking or aggressive acceleration. On the odd occasion I'll use WOT to pass a dawdler, but for the most part it's as sedate as can be. People often question me on why I bother with a Subaru if I just potter around with MPG in mind... well...because it can do the 'other' thing if I want it to. If I drove to work (20 odd miles each way) with my foot glued to the floor every day I'd not be able to justify it.
I've had two WRX wagons and got 3 distinct MPGs. These are calculated over about a year (20K miles) each!
Standard 2002 car: 27mpg
2005 car with PPP: 30mpg
2005 car with the modifications listed below: 33mpg
6mpg up from where I started.
A rare thing amongst Impreza owners, but I really prefer the response of a big V engine over a turbo. Even though the PPP pack brings a significant improvement at the lower end, it would still irritate me between 2,000 and 2,500rpm.... the sort of range where you just want a little throttle out of a corner to balance the car. After looking for a replacement (had to be a proper permanent 4x4 with an estate back not made by Audi... answers on a postcard) I decided to see if a little bit of tuning would sort it.
Had the standard up pipe, complete with pre-turbo cat removed and replaced with a ported item, replaced the primary cat with a pro-drive STI 200cell and then a remap to suit. The PPP map feels nice but it runs very rich at 3K5 and above, I guess for safety. It's now been leaned out a fair bit. The end result was exactly what I was after (was a little nervous I was going to chuck money at it and end up not getting what I wanted) - got a 50% torque increase at 2500rpm - also got about 20bhp at the top end.
Real world on my WRX I have seen everything from 17mpg to 33mpg over the course of a tank and have noticed very little real world difference in going from stock to decatted and remapped to 290/300.
North of Scotland last week I was seeing about 21-22mpg over 900 miles. That was using 97RON from the Ullapool station and then using Millers CVL Turbo booster to top it up, just to be safe, as the car was mapped on Tesco Momentum. 33mpg was on the way back down the A9, taking it steady and not being in any rush to be anywhere, especially back home!
Most of the time though a full tank does somewhere around 28-29mpg which involves a mix of journeys; a few short ones, some longer trips on Scottish A & B roads and a bit of dual carriageway if I'm heading to the hills. Driving style is brisk, with occasional WOT blats and a bit of sedate stuff too. Average, with minimal braking rather than maximum accelaration.
Drive like a tit around town and you'll see 15mpg a tank but if you're reasonably normal you should be seeing high 20's and just about low 30's on a steady 80mph-ish run.
ETA: 2003 WRX - Andy Forrest O/S Remap & on Shell Nitro or Tesco Momentum.
North of Scotland last week I was seeing about 21-22mpg over 900 miles. That was using 97RON from the Ullapool station and then using Millers CVL Turbo booster to top it up, just to be safe, as the car was mapped on Tesco Momentum. 33mpg was on the way back down the A9, taking it steady and not being in any rush to be anywhere, especially back home!
Most of the time though a full tank does somewhere around 28-29mpg which involves a mix of journeys; a few short ones, some longer trips on Scottish A & B roads and a bit of dual carriageway if I'm heading to the hills. Driving style is brisk, with occasional WOT blats and a bit of sedate stuff too. Average, with minimal braking rather than maximum accelaration.
Drive like a tit around town and you'll see 15mpg a tank but if you're reasonably normal you should be seeing high 20's and just about low 30's on a steady 80mph-ish run.
ETA: 2003 WRX - Andy Forrest O/S Remap & on Shell Nitro or Tesco Momentum.
Edited by Ennoch on Friday 1st August 11:24
05 Impreza WRX Wagon tweaked to ~240bhp and converted to LPG. Have been religiously monitoring fuel input/mileage. 20,000+ miles in 16 months at 24.53mpg.
Probably lower than everyone else but you do get a 10-15% economy drop on LPG. That said it's currently 65-69p per litre The conversion cost £1270, has already paid for itself and won't depreciate like other modifications do.
Probably lower than everyone else but you do get a 10-15% economy drop on LPG. That said it's currently 65-69p per litre
The conversion cost £1270, has already paid for itself and won't depreciate like other modifications do.I've said this before and I'll say it again. If you potter around and do average cruising on the motorway you'll get an average of about 25mpg. If you regularly give it the beans you won't get near 20. Combine this with a pathetically small tank and you've got a recipe for being really pissed off - constantly reminded you're getting poor fuel economy because you're always at the fecking petrol station. Trust me I know - I bought a new 55 plate STI and got rid after 9 months.
Food for thought - the difference between 20mpg and 30mpg might not sound that much because they're both not great. However you'll spend 50% less on fuel in the 30mpg car and probably a lot less on road tax too.
Food for thought - the difference between 20mpg and 30mpg might not sound that much because they're both not great. However you'll spend 50% less on fuel in the 30mpg car and probably a lot less on road tax too.
SonicHedgeHog said:
Food for thought - the difference between 20mpg and 30mpg might not sound that much because they're both not great. However you'll spend 50% less on fuel in the 30mpg car and probably a lot less on road tax too.
1. Road tax does not exist; it ended in 1937. 2. VED or Vehicle tax is set when the vehicle/model range undergoes EU type approval. No amount of changes to your driving style will change the amount of VED you pay. Only two modifications/performance enhancement will change the VED:
a. Conversion to LPG and re-registration as a bi-fuel vehicle with the DVLA attracts a £10 discount on VED. I have done this.
b. Conversion to electric hybrid will exempt the vehicle from VED and London Congestion Charge. Even Top Gear haven't done this!
SonicHedgeHog said:
I've said this before and I'll say it again. If you potter around and do average cruising on the motorway you'll get an average of about 25mpg. If you regularly give it the beans you won't get near 20. Combine this with a pathetically small tank and you've got a recipe for being really pissed off - constantly reminded you're getting poor fuel economy because you're always at the fecking petrol station. Trust me I know - I bought a new 55 plate STI and got rid after 9 months.
You can say it as many times as you like, it doesn't mean everyone elses experience or opinion is the same as yours. Trust me I know - I bought a Legacy GTB and still have it 6 years later.I'd call 60L an average size tank myself, small would be the 45L tank on a Mk1 MX5.
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