1994 Corvette MPG
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Pro
Joined: Sep 2006
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1994 Corvette MPG
I have a '94 auto and on my last tank I got 12.2 MPG while keeping my foot OUT of it. This is with A/C on and pure city driving. Is this normal? I think it seems crappy for taking it easy.
Also, what's an acceptable coolant temp range for these cars to be at? Mine consistently gets around 225-227 driving around in the city, is that OK?
Also, what's an acceptable coolant temp range for these cars to be at? Mine consistently gets around 225-227 driving around in the city, is that OK?
Le Mans Master
Joined: Jul 2009
Posts: 8,041
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From: EOF ★ Kaliforniastan ★
St. Jude Donor '10
I have a '94 auto and on my last tank I got 12.2 MPG while keeping my foot OUT of it. This is with A/C on and pure city driving. Is this normal? I think it seems crappy for taking it easy.
Also, what's an acceptable coolant temp range for these cars to be at? Mine consistently gets around 225-227 driving around in the city, is that OK?
Also, what's an acceptable coolant temp range for these cars to be at? Mine consistently gets around 225-227 driving around in the city, is that OK?
Thread Starter
Pro
Joined: Sep 2006
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Le Mans Master
Joined: Jul 2009
Posts: 8,041
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From: EOF ★ Kaliforniastan ★
St. Jude Donor '10
Well 12 isn't too far off from the 15 since as you stated it was all city. Throw in the A/C and the fact that manufacturer numbers are based on a drum and not real world conditions and it seems you are doing ok. Keep track of your numbers and see if it adds up...
Instructor
Joined: Jan 2008
Posts: 122
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From: Calgary AB
just did the math to convert to US gallons from metric up here in Canada. I have 62 000 miles LT1 no engine mods. Current city milage is 14.5 mpg that's with premium (92 octane up here). If I use regular (87 octane) I lose about 1mpg.
Race Director
Joined: Apr 2004
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From: Milpitas ca
Elite Torch Red Member
Joined: Sep 1999
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From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
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St. Jude Donor '03-'04-'05-'06-'07
How are you calculating? If using the old divide miles driven by gallons used, 12.2 is a little low. If using the digital readout on the dash, did you reset it first, if not, try that first, if you did reset it, then yes 12.2 is low.
On my 95, I've had a best average of 28 mpg highway, 15-17 around town, 10-12 running it hard and 8 drag racing.
On my 95, I've had a best average of 28 mpg highway, 15-17 around town, 10-12 running it hard and 8 drag racing.
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Drifting
Joined: Aug 2009
Posts: 1,964
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I get 17mpg in my 94, with 4.11s, and an occasional romp on the on-ramp but mostly in town driving (not too much traffic). Not bad considering my 6cyl daily driver only gets 22mpg!
o2 sensors perhaps? Not sure if they would throw a code when they get lazy. I haven't changed mine.
o2 sensors perhaps? Not sure if they would throw a code when they get lazy. I haven't changed mine.
Burning Brakes
Joined: Aug 2009
Posts: 950
Likes: 8
From: Bowling Green Ohio
Best way for me to check is to fill up at the same pump until the nozzle clicks off automatically and then divide miles on the trip odometer (reset on the last fill up) by the gallons of gas on the pump register. I get a consistent 19-20 mpg which I like. A little lower if I get on her a lot. Most of my daily drive is expressway and I really don't use the a/c that much. 12 does seem a bit low.
Safety Car
Joined: Aug 2008
Posts: 4,344
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From: San Marcos CA
above 50 mpg you are basically going downhill. My 2 liter diesel can get 47 mpg (50 mpg for short distances), but otherwise 30 mpg is good.
12l/100km is about 20 mpg, so 6l/100 is almost 40 mpg.
what do you care, oil is free in the Kingdom, right?
Team Owner
Joined: Aug 2005
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From: Riverside County Southern California
Co-winner 2020 C4 of the Year - Modified
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St. Jude Donor '09 thru '20
22-23 Is the best I get out of 95 LT1 A4, You are normal.
Drifting
Joined: Jan 2010
Posts: 1,624
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From: Saudi Arabia
what do you care, oil is free in the Kingdom, right?
you kidding right ? since you were born did you hear about anything free except air that you breath ?
There is oil in this country but everything is getting more expensive these days.
The only cheap thing we have here is Gas !! 95 octane and 91 octane is cheaper.
Le Mans Master
Joined: Jan 2006
Posts: 5,620
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From: Orlando FL
I get 17mpg in my 94, with 4.11s, and an occasional romp on the on-ramp but mostly in town driving (not too much traffic). Not bad considering my 6cyl daily driver only gets 22mpg!
o2 sensors perhaps? Not sure if they would throw a code when they get lazy. I haven't changed mine.
o2 sensors perhaps? Not sure if they would throw a code when they get lazy. I haven't changed mine.
I would get a scanner on there or Tech1 type of unit and look at 2 things. See if the O2 voltages swing rapidly high and low.
And also make sure it is going into close loop operation. If it is not, then the O2 calculations are not being used.
I get in high teens in city, 20 combined city and expressway and 24-25 on expressway.
Last edited by pcolt94; Jun 17, 2011 at 02:41 PM.
