30+ Mpg
Drifting
Joined: Feb 2008
Posts: 1,537
Likes: 177
From: NE Ohio
2024 C4 of the Year Finalist - Unmodified
Drifting
Joined: May 2007
Posts: 1,440
Likes: 19
From: SW Chicago Burbs IL
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Le Mans Master
Joined: Mar 2006
Posts: 5,262
Likes: 0
From: E. Amherst NY
Racer
Joined: Dec 2007
Posts: 345
Likes: 0
From: Flint Michigan, #2 in unemployment, #3 in Violent crimes
I will get an average of around 29 MPG on the highway at 70 but I also have the 3.07 gear, so you 2.5x rear gear guys are going to have 3-4 MPG over me.
it all sounds about right to me. I can fill mine up, and drive for 3 weeks before it needs gas again. this is also my "economy" car. being that the turbo PT cruiser only gets 26 highway and my ZR2 s-10 gets 21
it all sounds about right to me. I can fill mine up, and drive for 3 weeks before it needs gas again. this is also my "economy" car. being that the turbo PT cruiser only gets 26 highway and my ZR2 s-10 gets 21
Burning Brakes
Joined: Oct 2005
Posts: 824
Likes: 30
From: San Pablo California
My 87 with 3.07 gears gets right around 29.2 at 65 mph on the cruise control over flat terrain and this is with a 383 stroker and emissions legal Edelbrock heads with 24 ib Accel injectors.
The engine remains at 9.5 to 1 compression and was built to pass California emissions.
The engine remains at 9.5 to 1 compression and was built to pass California emissions.
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Safety Car
Joined: Oct 2007
Posts: 3,816
Likes: 0
From: :45 minutes from everywhere / E-I-E-I-O
Mine would do just under 30 at 65 mph.
Then this morning, when the 3 codes tripped up, it dropped to 21 - 22 in a 15 mile stretch. I could smell the rotten eggs smell (rich burn) at the stoplight in the next town...
Then this morning, when the 3 codes tripped up, it dropped to 21 - 22 in a 15 mile stretch. I could smell the rotten eggs smell (rich burn) at the stoplight in the next town...
Melting Slicks
Joined: Oct 2006
Posts: 2,314
Likes: 3
From: In a van down by the river! Florida
wow, looks like I need a tune up lmao.
Driving highway I can get about a 27-28 average, but I'm never on the highway anymore.
Since all stations here switched to that ethanol crap, I'm seeing a solid 2.5MPG drop in the city.
Driving highway I can get about a 27-28 average, but I'm never on the highway anymore.
Since all stations here switched to that ethanol crap, I'm seeing a solid 2.5MPG drop in the city.
Intermediate
Joined: Jun 2008
Posts: 32
Likes: 0
From: S.Indiana
mine I suspect is dead it sits on 99mpg all the time not ever a change..anybody know what I would need to do to fix it? since were on the subject..
Intermediate
Joined: Jun 2008
Posts: 32
Likes: 0
From: S.Indiana
rotten eggs usally means the cats are about done....check them from time to time and see if there flaming red if so there clogged..
Pro
Joined: Jul 2006
Posts: 636
Likes: 0
From: Cheshire Connecticut
I have an 88. the only mod has been the mufflers, I have never seen more than 18 MPG avarage and now since I have the transmission and the differential serviced I do not go higher than 14 mpg. The car has 89000 original miles. Does anyone why is it that I have such a low readings on my avarage mpg? I drive at an avarage of 80 mph, that's this has anything to do with it at all?
LJ
LJ
Last edited by lumij3; Jun 25, 2008 at 07:39 PM.
Drifting
Joined: Apr 2007
Posts: 1,339
Likes: 2
From: port charlotte fl
Don't believe any of this.Most of the time the readout is bull****.The only way to tell MPG is to fill the tank,drive 200 miles and refill the tank.Then do the math.My average always shows around 18 but I only get about 12 to 14 when I do it on fill ups compared to mileage.On a long highway run I can get about 28/30 if I keep it around 80 but the read out says 23????
