Hopefully I'm not going over old ground too much......

Recently bought an MY99.
No matter how easy I drive it, it won't do more than 25mpg. This weekend I did a whole tank on the motorway going strictly at 70mph with almost no right foot use at all - not even down the slip roads - and also minimal urban driving at either end of journey.

When driving harder it does 22mpg (what I expect) - but if I bother to make the effort to be economical (and have a boring journey) I would like it to give me better results! It has a scooby sports backbox and an ITG panel air filter all fitted by the dealer at 1000 mile service (has now done 19k) - could these be affecting it? If the MAF sensor has been damaged by putting the air filter in would it show these symptoms?

Tyre pressures are standard. Apparently there was a smell petrol out the back of it last week (but it had only just been started and so was on the choke) - I haven't confirmed this myself yet.

I haven't had any warning lights at all.

Any pointers? - I'm always seeing people on here say it should do 30mpg on a motorway run.

Jon

 

Nope - sounds about right to me.

I've got an MY99 and never got over 25mpg no matter what I do.

Don't often get over 20 now or should that be

 

Ditto - 22-23 is what to expect. I forgive her though!
Had the Link installed at the weekend, so should be interesting to compare!
JohnD

 

Ditto again i'm lucky if i get anywhere near 25 mpg on my my99 and it doesn't really seem to make a difference how i drive

 

I have bog standard MY99. If I drive really carefully (slowly) I can manage about 30mpg. However I have also got under 15mpg as well!

C U Pat

 

whats going on here?????

Our my99 can manage 38mpg, thats 5 up and a boot full to the brim going to the South of France, ours has magnex bb, jap inovations de-catted centre and a itg panel filter.

all motorway miles, keep it between 3000rpm and 3500rpm fluctuating the speed otherwise its bad for the engine keeping a light right foot (apart from the occasional blast to remove any 205's from my bootlid :-) which turn up about 5 mins later at v-max!!!)

 

38!! Didn`t know Subaru made diesels!!

 

In my standard MY99 I get up to 28 for a motorway run, but down to (very) low 20s on "interesting" roads!

I guess making the exhaust more free-flowing improves general efficiency (as well as performance) - although this would be the least of the reasons for getting one .

Have you seen Are Scoobs REALLY thirsty??

 

I get 25 as well no matter what I do to improve economy. Easy to get less, impossible to get more.

I have noticed the petrol smell too, usually after a cold start then putting the car straight in the garage. Garage honks of petrol in the morning after. Must be evaporating out of exhaust pipe.

Getting on for 3 years old now and been doing it all the time, dont think therefore it is anything to worry about.

Beastie

 

Yeah about the same for me average about 20-22mpg (my99 with ITG filter) on a long run though about 3000-3500 revs 30mpg seem to like to cruise 80-90 mph better than 70mph

 

Since they dont make desiel's I assume he gets 38 Km to the Gallon??

I get 23mpg which seems to be the norm, 25-26 on a motorway run, 15 or less when driving as it should be driven!

 

My MY00 Impreza turbo usually returned about 18-20MPG around town. Best ever around town was 23MPG and best ever on the motorway was 29MPG.

 

MY99 4dr
Running Pipercoss ind kit, Magnex decat centre and a Mongoose b/box

On SUL i was averaging 23/4MPG ave.
On Optimax i recon on 26/7MPG ave.

 

MY 99 PPP,FMIC,De-cat and induction used daily on A and B roads, bit of motorway and some poxy London traffic, on Optimax 27mpg on SUL about 24mpg. Go v.fast about 10mpg !!! (I dont go fast very often cos I'm nearly 40).

Regards, Mole's Dad.

[Edited by mole - 1/22/2002 9:46:01 PM]

 

My scooby averages around 23mpg on optimax, combined around town and motorway. ... peaks at 26ish for a gentle motorway run.

Given up working mpg out lately .... its bad enough seeing the fuel bill for 2k miles a month!

 

24.67 mpg average for the last 25467 smiles.

Doesnt seem to matter how I drive it, appart from booting it round the lanes where it will drop to 20.

T.
MY99

 

MY00 when new in the summer with air con on returned 31.4 MPG. I had a drama with the ECU and changed it for a MY99 and it went down to 28 MPG. I agree the best speed to save fuel on the motorway is around 80 to 90 MPH.

Can get it much lower 18 MPG easy, oh and 7 MPG at Bedford

Cheers Phill C

PS ITG and Scoobysport BB

 

Went autosport the other week and with four people i got over 30 mph, thats averaging 80-85. Car has quikshift racing stainless induction filter, magnex bb with magnex centre section(no resnator). Always gets that aswell until foot down, different story!

 

Sorry 30 mpg not mph, my99 by the way

 

MY00, Standard ECU, 5 Zigen exhaust mid and backbox, APS cold air induction kit, Blitz DSBC (electronic boost controller) running 1.17 bar boost, I get 28 MPG driving conservatively with a few blasts, but if I give it frequently I get 21.4 MPG.

Cheers,

Wrexy.

 

My MY99 is completely standard Euro-spec. Have made
records for both low and high petrol consumption. In fact
on the same trip...
Low record: 8.5 liters/100km (33mpg) driving on E4 through
Sweden at steady speed.
High record: 16 liters/100km (17mpg) driving on a German
autobahn with not-so-steady speed.

 

MY98 5dr (58,000 miles), PE T75 down pipe, std. centre with CAT, PPP back box, K&N STi induction kit. (Dawes on order!). 23-25mpg average. 17-20 on cold short runs or a blast. Best ever motorway 27.8mpg. All on Optimax

Tom

 

Ditch those cats & get a downpipe fitted, I regularly see 30mpg on the motorway, and thats with a Type R (MY99) with shorter ratio gears.
Dan