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What can effect fuel economy? 

 

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 Post subject: What can effect fuel economy?
Posted: Tue Dec 27, 2005 5:57 pm 
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ok well, my economy is sitting on 17+ L/100km!

am i too picky? its an EF 6 fairmont

i have an AU3 xr8 intake snorkel, k&n filter, new plugs, new leads, ph 4499 extractors with 2.5" lukey system, new oxygen sensor and have run a tank of injector cleaner...

i think thats all ive done from memory..

why is it so high? :cry:

what else can effect economy to that amount? i dont like my trip computer beeping at me after ~350km

 

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Posted: Tue Dec 27, 2005 6:19 pm 
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ur heavy foot, mines sittin at 14.3

 

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Posted: Tue Dec 27, 2005 6:21 pm 
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Holy s**t Gaz!!!! My EF XR6 gets 700km per tank sometimes more.
With all that s**t done to the engine I reckon your gearbox is probably stuffed. Running around in 3rd or something.

s**t even my EL XR8 gets 550-600ks per tank.

What have you done????

 

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Posted: Tue Dec 27, 2005 6:24 pm 
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aint my heavy foot, if i baby it around not taking it over 2500rpm ill still get about 17 :\

would hope its not the box, it isnt making any funny noises, and its only 120,000km old... might get it in for a full flush later this week maybe

 

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Posted: Tue Dec 27, 2005 6:33 pm 
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Even if the box isn`t finding 4th gear fuel should be better than that its only a 6 get the computer analised.

 

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Posted: Tue Dec 27, 2005 6:49 pm 
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whats a dyno run cost these days? it would be good to see what the AFR's are like i guess?

 

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Posted: Tue Dec 27, 2005 6:56 pm 
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decent dyno should cost around $60 to $80 an hour but you will find out wots wrong


EF 5.0 ave 13L/100 IF UP IT

 

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Posted: Tue Dec 27, 2005 9:37 pm 
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dunno but mny fuel economy went form 15L per 100k to 12L per 100k wehn i changed it to manual so if ures is auto will make a diff compared to the manual but s**t thats still pretty high.

when u say ure heavy footed what u mean by that like u rev it out all the time>
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Posted: Tue Dec 27, 2005 10:28 pm 
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i said i aint heavy footed..

it will see 4000rpm maybe once a day... most of the time it doesnt see anything over 2500-3000rpm

 

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Posted: Tue Dec 27, 2005 11:06 pm 
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fuel filter dude

 

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Posted: Wed Dec 28, 2005 11:14 am 
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Quote:
My EF XR6 gets 700km per tank sometimes more.



How do you get that many kays out of the XR6?? At 110 what rpm are you running at??
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Posted: Wed Dec 28, 2005 11:22 am 
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have you tried resetting your computer?

 

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Posted: Thu Dec 29, 2005 11:55 am 
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Make sure your wheels are aligned properly and bump the pressures in your tyres up. I run 44psi in mine. Don't let anyone tell you high pressures are bad.

It won't make much difference, maybe 20km/tank, but it's a saving.

Run a thinner oil if you can aswell. You can forget about the W rating of an oil in Australia. That's the winter viscosity, but since our weather is so mild, a 40 and a 50 wil be virtually the same. Run a 15w40 or a 10W30 if you can. Will help a tincy wincy bit with economy.

Also, what terrain do you drive in and how long are the trips you're doing?

If you're doing short trips and the car is cooling down between trips, then the engine will be running in cold start mode a lot more than if you do one big long trip. When the engine's cold, the fuel condenses on the cold parts fo the engine and as such, the engine needs more fuel to attain the correct mixture hence why you use more fuel. Hilly terrain will also stuff up your fuel economy.

In my fiance's EF auto, I can barely get 400km/tank when I just use it to go to work and back. 300km if I push it hard. That's because there is no flat on the way to work and it's all up hill, down hill etc etc. On a highway trip, it'll do 750km to a tank. @ 110km/h
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Posted: Thu Dec 29, 2005 8:33 pm 
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tyres are running ~44PSI, (max load rated at 50PSI)

went to try change the fuel filter today.. that didnt wanna budge! one of the bolts started to round so i gave up on that, ill drop past a mechanic and pay him 30 mins of his time to do it ;)

 

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Posted: Thu Dec 29, 2005 11:46 pm 
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CRC man!

 

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