Real world Impreza mpg comparisons

[paulmoonraker]

Oh yeah

350bhp and a forged engine... Hilarious fun

[JFReturns]

MY02 WRX STi: 18mpg
MY06 WRX Wagon 2.5: 24mpg

Both standard, run on vpower, warmed up then driven normally with my commute being country lanes.

As a comparison on the same journey:

E92 325i: 24mpg
VX220 2.2: 30mpg
Panda 100hp: 34mpg
S2000: 25mpg (ish, can't really remember)

[Not a Diesel!!!]

My wife drives a 2005 STI with PPP.

She gets 27 mpg on her work run. Drops to nearer 20 mpg with short trips.

Her Previous Cars on the same journey.

130i - 34mpg
Z3M Coupe - 27 mpg
Clio 197/200 - 36 mpg
Clio Trophy - 40 mpg

She is very light footed.

[NormalWisdom]

Drove Munich to Reading yesterday

780 miles at an average of 31.3 mpg using ARAL102ron

MY00 WRX PPP Wagon

Between 70 & 90 on the Autobahn all the way

Impressively I could still walk after 13 hours in the seats!! (I am over 50....)

[Craivold]

paulmoonraker said:

Oh yeah

350bhp and a forged engine... Hilarious fun

Looks fun!! I keep toying with the idea of tickling my WRX wagon - just a prodrive backbox (for more burble innit!) on it at the moment. It's done 119k miles now but runs lovely and sweet + 30/32mpg. I wonder if I go the remap and full exhaust route will I lessen the life of the engine and ruin the mpg?

NormalWisdom said:

Drove Munich to Reading yesterday

780 miles at an average of 31.3 mpg using ARAL102ron

Great effort! I've done an 8 hour drive in mine and still felt fairly fresh, they're pretty comfy in standard form I reckon - the shape of the seats help

[MurderousCrow]

Some of you are getting brilliant economy! I've had two Imprezas, the latter is my current car. Both blob-eyes, both modified.

'04 Type UK STi PPP, K&N panel filter, SC38 turbo, Milltek cat-back. Did 17-22mpg (24mpg nursed), 80% motorway, 15% urban overall.

'05 Type UK STi PPP, rotated intake, GT3076 turbo, Milltek turbo-back. Does 16-21 mpg (22 nursed), again 80% motorway 15% urban. In stop-start traffic it might get down to 15mpg, on track around 8-10...

Craivold said:

I wonder if I go the remap and full exhaust route will I lessen the life of the engine and ruin the mpg?

...maybe!

ETA: (FTFY )

Edited by MurderousCrow on Tuesday 16th December 06:07

[Craivold]

Yeah that's what I fear! I always run it on 99 RON (mainly tesco) and have Conti Sport Contacts all round. Mainly 40-60mph A and B road driving with about 10% being urban thrown in. I've only twice got less than 300 miles to a tank and that was with some really enthusiastic driving

[paulmoonraker]

Remapping on the standard turbo usually improves efficiency a bit. However, if you start putting a bigger turbo on, then it will drop.

[MurderousCrow]

All true. The standard turbo is pretty good and freer breathing should help efficiency. Craivold I wouldn't necessarily worry about engine wear per se:

Craivold said:

Got a 52 plate bugeye that I've had for nearly 3 years

Get the work done by a reputable mapper.

- if the engine's fine to start with

- the mapper knows what they're doing

- so long as you get regular oil changes (done by a mechanic who knows how to prime the galleries),

your engine will be just grand. Just don't ask the mapper to wring the nuts off it!

[AntiLagGC8]

My RB5 was previously running a TD04, sports cat, prodrive ecu on a forged engine and achieved 22-24mpg on the run.

It's just been converted to a Twin Scroll (VF37), Equal length headers (for twin scroll), 550C injectors, Miltek exhaust, alcatek ecu and a bunch of other stuff and now does 30mpg on a run.

[SCEL1SE]

30mpg is the most i had out my 2005 wagon WRX mapped.
42mpg out of my SC 240 Exige?

[Craivold]

MurderousCrow said:

Get the work done by a reputable mapper.

- if the engine's fine to start with

- the mapper knows what they're doing

- so long as you get regular oil changes (done by a mechanic who knows how to prime the galleries),

your engine will be just grand. Just don't ask the mapper to wring the nuts off it!

Cheers for the advice. Very tempted to get it done. Got a wedding to pay for first though...

[AntiLagGC8]

Craivold said:

MurderousCrow said:

Get the work done by a reputable mapper.

- if the engine's fine to start with

- the mapper knows what they're doing

- so long as you get regular oil changes (done by a mechanic who knows how to prime the galleries),

your engine will be just grand. Just don't ask the mapper to wring the nuts off it!

Cheers for the advice. Very tempted to get it done. Got a wedding to pay for first though...

I've been in tons of mapped Impreza's and the difference of a good map and a decat is huge. It unlocks so much more potential in the car, not to mention they drive much better.

I've never had one mapped until late last year and with the upgrades my car is completely different.