Mpg
#1
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Join Date: Aug 2004
Location: Murrysville PA
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14.5 mpg
i have been down to 14.5 mpg recently on the 8. its a 2004 with 68k on it. in 2005 i put a cold air intake on it. but still, 14 mpg is terrible. is there any quick fixes anyone has.
also, it has been stalling more and more when coming to a stop, probably tied to the cold air intake. should i take off the k&n fiter, clean that? didnt think that was supposed to be cleaned, but not sure. or is there another fix for that?
also, it has been stalling more and more when coming to a stop, probably tied to the cold air intake. should i take off the k&n fiter, clean that? didnt think that was supposed to be cleaned, but not sure. or is there another fix for that?
#2
Its all about Style...
Join Date: May 2006
Location: South of Boston, MA
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I get 12.5mpg on avg so cry me a river.. lol.. I wish I got 14.5mpg. If you think your air intake is the problem I'd sugest taking it out and see if your theory is correct.
#6
is it k&n v1 or v2?
Idle issues are known with 1. I would also recommend an engine compression test if your idle doesnt improve after you check the standard maf, spark, coils, etc.
Poor idle can sometimes be serious.
Idle issues are known with 1. I would also recommend an engine compression test if your idle doesnt improve after you check the standard maf, spark, coils, etc.
Poor idle can sometimes be serious.
#7
Vegas rx8!
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i just got 15.15 mpg on my last tank. i red lined it a lot so....you must be doing the same. just drive like a granny for 1 tank and see if you get an improvement.
last tank = 203 miles $42 for fill up 13.396 gallons used
last tank = 203 miles $42 for fill up 13.396 gallons used
#8
The Professor
i have been down to 14.5 mpg recently on the 8. its a 2004 with 68k on it. in 2005 i put a cold air intake on it. but still, 14 mpg is terrible. is there any quick fixes anyone has.
also, it has been stalling more and more when coming to a stop, probably tied to the cold air intake. should i take off the k&n fiter, clean that? didnt think that was supposed to be cleaned, but not sure. or is there another fix for that?
also, it has been stalling more and more when coming to a stop, probably tied to the cold air intake. should i take off the k&n fiter, clean that? didnt think that was supposed to be cleaned, but not sure. or is there another fix for that?
K&N version 2 is better (carbon fiber tube with filter in middle.) -
If it doesn't look like the filter above, then thats whats causing the stalling.
Otherwise you probably need to change your sparkplugs or your ignition coils.
#9
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I've been averaging 15mpg as of late, so it sounds almost normal. My mileage was unaffected by installing a MS CAI, and it really doesn't vary much by driving conditions or style (14-18).
Last edited by Jasonawojo; 02-17-2008 at 06:14 PM.
#15
#19
Metatron
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Razz is probably right - winter gas will be around 10% less mileage.
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
#20
Living In The Past
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Razz is probably right - winter gas will be around 10% less mileage.
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
#22
Razz is probably right - winter gas will be around 10% less mileage.
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
I was really surprised when I bought the ScanGauge (it reads out fuel consumption) that the high revs were such a penalty - at constant speed, twice the revs equalled twice the fuel use. I was expecting a penalty, but didn't expect such a hit.
S
Yep. Doing higher speeds even in completely clear traffic on the highway sucks gas quickly in the 8.
So, whether you're short shifting in city driving, or driving at faster speeds on the highway, you will pay a definite penalty in mpg.
In my experience, 65 to 70 mph, with obviously clear freeways, yields around 22.6 mpg for me.
#23
Huge hole is huge
#24