12.5 mpg????
Thread Starter
Pro
Joined: Sep 2010
Posts: 707
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From: Murrysville PA
12.5 mpg????
New to me 2005 vert with 24,000 miles, 6 speed manual only getting 12.5 miles per gallon in the city.
Has a 373 rear end which was an option that came with the car.
I don't track this car and only get on it a few times a day when driving just to appreciate the acceleration. All fluids have been changed.
This seem considerably low mpg based on what others are reporting (16-18 mpg in the city). Had it on the highway yesterday for 10 miles or so and mileage increased to 15.5, still way to low. I have used Tectron and Seafoam in the first full tank of gas; tires have proper inflation.
What should be checked????
thank you!
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
3:73 gears were not sn option on that car. They only came with 3:42 gears. That is part of the problem. Also, was everything recalibrated when the gears were changed? If not, you will get false readings.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
12.9 isn't bad for true "City" driving. Nothing but stop and start traffic with stop signs, lights and heavy traffic will drop the MPG quickly.
First thing you need to do is to re-set the average MPG and average MPH numbers so you are starting from scratch. Fill the car, note the mileage and re-set your trip oddometer. Drive your normal route for at least 1/2 a tank and then re-read (and re-set) your avg mpg and mph. Then take your ballpoint calculator and divide the miles by the gallons used, that is you actual MPG, compare it to your DIC reading and see how close they are.
A real eye opener is to leave the instantaneous mileage on the DIC after a fill-up and watch the MPG drop when you sit at a light or idle thru a fast food drive thru.
First thing you need to do is to re-set the average MPG and average MPH numbers so you are starting from scratch. Fill the car, note the mileage and re-set your trip oddometer. Drive your normal route for at least 1/2 a tank and then re-read (and re-set) your avg mpg and mph. Then take your ballpoint calculator and divide the miles by the gallons used, that is you actual MPG, compare it to your DIC reading and see how close they are.
A real eye opener is to leave the instantaneous mileage on the DIC after a fill-up and watch the MPG drop when you sit at a light or idle thru a fast food drive thru.
Thread Starter
Pro
Joined: Sep 2010
Posts: 707
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From: Murrysville PA
You are correct. The window sticker says 3:42. So the gears were never changed; it came that way from the factory
Thread Starter
Pro
Joined: Sep 2010
Posts: 707
Likes: 0
From: Murrysville PA
12.9 isn't bad for true "City" driving. Nothing but stop and start traffic with stop signs, lights and heavy traffic will drop the MPG quickly.
First thing you need to do is to re-set the average MPG and average MPH numbers so you are starting from scratch. Fill the car, note the mileage and re-set your trip oddometer. Drive your normal route for at least 1/2 a tank and then re-read (and re-set) your avg mpg and mph. Then take your ballpoint calculator and divide the miles by the gallons used, that is you actual MPG, compare it to your DIC reading and see how close they are.
A real eye opener is to leave the instantaneous mileage on the DIC after a fill-up and watch the MPG drop when you sit at a light or idle thru a fast food drive thru.
First thing you need to do is to re-set the average MPG and average MPH numbers so you are starting from scratch. Fill the car, note the mileage and re-set your trip oddometer. Drive your normal route for at least 1/2 a tank and then re-read (and re-set) your avg mpg and mph. Then take your ballpoint calculator and divide the miles by the gallons used, that is you actual MPG, compare it to your DIC reading and see how close they are.
A real eye opener is to leave the instantaneous mileage on the DIC after a fill-up and watch the MPG drop when you sit at a light or idle thru a fast food drive thru.
I will follow your instructions but the sticker on the windshield says "18" in the city?????
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
The sticker also says "your mileage may vary". GM had a choice to under or over report the possible mileage. guess which they took?
The Governments idea of City driving is different than actuality.
If you want to impress someone switch the gauge to instant MPG, get to the top of a long hill, shift to nuetral and let the car coast. Take a picture of the 70+MPG showing. Or; Fill the tank and before leaving the pump reset the MPG, switch to instant MPG, sit there and idle for a few minutes and take a picture of the 0.00MPG.
Last edited by haljensen; Apr 13, 2014 at 05:35 PM.
Team Owner
Joined: Oct 2004
Posts: 27,420
Likes: 64
From: San Clemente CA
I have a 2005 manual and drive three miles to work and three miles home five days a week and I get around 12.5 mpg. On long trips I get 29.5 mpg. Around town if I do a little freeway driving it does improve some. 
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Thread Starter
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Joined: Sep 2010
Posts: 707
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From: Murrysville PA
Melting Slicks
Joined: Nov 2007
Posts: 2,285
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From: Pittsburgh PA
St. Jude Donor '10-'11-'12-'13-'14
That's about what I get from my 2006 MN6. Stop and go traffic, red lights and stop signs, and hills really kill city mileage.
