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 Post subject: Chewing through fuel
PostPosted: Fri Jun 12, 2015 11:27 am 
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I Say: SUBNUB - be kind
Vehicle: MY05 XT LUX

Posts: 25
Location: Milperra
Hi guys, just bought my 04/MY05 XT Forester on sat and have been chewing through fuel like no tomorrow.
Full tank of 95 and it seems im down to half a tank after 100-150km of city driving.
Is this normal? Im trying not to drive agressively but I know its due for a service soon. Would that help? Should I be checkin O2 sensors or am I just that bad at driving economically?
Im used to driving an auto so now having manual might be the reason as im still adjusting but surely it shouldnt be this bad!


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 Post subject: Re: Chewing through fuel
PostPosted: Fri Jun 12, 2015 1:44 pm 
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I Say: I have CDO. It's like OCD except the letters are in alphabetical order, as they should be.
Vehicle: MY05 XTL - Black

Posts: 5069
Location: Tanah Merah - Brisbane
I would switch to 98 for a start but there are many factors that will effect economy. It does seem to be going through a more than I would expect though.

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 Post subject: Re: Chewing through fuel
PostPosted: Fri Jun 12, 2015 2:50 pm 
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Vehicle: MY05 XT - Silver

Posts: 375
Location: Sydney
Make note of how many litres you are filling at the pump, at each fill reset the trip meter so you know how many k's you have done. The gauge on the dash is only good for telling you when the tank is full and when it is empty, everything else in between isn't a true reflection. For an 04/05 manual XT i think anything between 11-12L/100 would be normal.

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 Post subject: Re: Chewing through fuel
PostPosted: Fri Jun 12, 2015 5:58 pm 
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I Say: SUBNUB - be kind
Vehicle: MY05 XT LUX

Posts: 25
Location: Milperra
Thanks guys, ill wait till its empty then see how I go on a full tank of 98 and then compare it to after my service next sat.
Anyone know what to expect from a 150,000 service?


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 Post subject: Re: Chewing through fuel
PostPosted: Fri Jun 12, 2015 9:12 pm 
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I Say: I miss boost :/
Vehicle: Getz of Glory

Posts: 3455
Location: Newcastle-ish
When you empty the 95 and fill with 98, disconnect your battery and pump the brake pedal a few times. Reconnect your battery and be on your way.
this will reset any learning parameters in the ecu, the car will 'like' the 98 more and economy may return. Its a free and easy potential fix.

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 Post subject: Re: Chewing through fuel
PostPosted: Fri Jun 12, 2015 11:15 pm 
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I Say: SUBNUB - be kind
Vehicle: MY05 XT LUX

Posts: 25
Location: Milperra
This totally sounds like cheat codes for a comouter game ^
Will try it though!
Rekon it would be worth giving the maf a bit of a clean while im at it?


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 Post subject: Re: Chewing through fuel
PostPosted: Sat Jun 13, 2015 2:07 am 
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I Say: Mission: Kill the CEL
Vehicle: MY07 XT Silver

Posts: 474
Location: Sydney, Australia
After resetting the ECU, I think you're supposed to start the car and let it idle for as much as 5 minutes (I only did 2 minutes).
Some people have reported stalling and bad idle after a reset if it wasn't allowed to idle afterwards.

Cleaning the MAF? I don't know, aren't they a bit fragile? Have a look to make sure it's not crusted up, but take care if you do.

Definitely agree with using 98 on any turbo Suby instead of 95.
And same on measuring your Kms with the trip meter and resetting it when you fill up. Judging mileage by the needle has too much variation in it.

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 Post subject: Re: Chewing through fuel
PostPosted: Sat Jun 13, 2015 2:19 am 
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I Say: Embrace the Grind
Vehicle: Regal Blue 05 XT Lux manual

Posts: 5507
Location: Perth
meh I use 95 or 98 whatever is around but I am tuned for 95
150km to half tank is definitely not normal


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 Post subject: Re: Chewing through fuel
PostPosted: Sat Jun 13, 2015 3:13 am 
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I Say: SUBNUB - be kind
Vehicle: MY05 XT LUX

Posts: 25
Location: Milperra
Yeh I thought maybe the sensors in the maf might be a little covered in crap if they have never been cleaned. I'll fill up tomorrow and try all the restart and idle stuff. Long term I will get it tuned, but for now shes still quite a perky ride imo :)
Shame the turbo takes about ten years to spool. Makes it almost useless for Street application. :(


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 Post subject: Re: Chewing through fuel
PostPosted: Sat Jun 13, 2015 9:32 am 
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Vehicle: MY10 XTP & MY06 RColt

Posts: 559
Location: Newcastle, NSW
Grahama wrote:
Cleaning the MAF? I don't know, aren't they a bit fragile? Have a look to make sure it's not crusted up, but take care if you do.

This. Cleaning a MAF should be done with great care, and using any type of cleaning product is potpotentially fatal for the MAF.
If there are visible crustaceans on it, I would try remove as much as possible without physically touching it (blow it with air, work up to compressed air) if any solvents are used, take extra care to ensure they are electronic based cleaners and its 110% dry before refitting.


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