Crappy Mpg!
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 775
Likes: 36
From: Nashville, TN
Thanks guys. I do have mods. Blackwing. Stingers. Hurst. Dynotune for more horses (Vettedoctors told me that I was running too rich before he tuned it). The car has 29,000 miles on it and all scheduled maintence done.
I think it may be the cold air. I live in NYC and my Vette is my daily driver. Yes. LOTSA LOTSA stop and go drivng. And I always use Mobil Super (93 octane)
And my tires are at 30psi cold and when hot have reached 37 psi. Just happened today. (BTW, is that bad for the tires?)
I guess that's the answer to my questions.
Thanks for the info
I think it may be the cold air. I live in NYC and my Vette is my daily driver. Yes. LOTSA LOTSA stop and go drivng. And I always use Mobil Super (93 octane)
And my tires are at 30psi cold and when hot have reached 37 psi. Just happened today. (BTW, is that bad for the tires?)
I guess that's the answer to my questions.
Thanks for the info
Last edited by DrValidus; Feb 7, 2005 at 06:16 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The more air pressure the less rolling resistance BUT,, you sacrifice traction and promote excessive tire wear in the center of the tires! I set my tires at 28 read and 29 fronts (COLD) and get very even wear across the entire tread width and seems to get very good traction.
Bill
Bill
Melting Slicks
Joined: Jul 2003
Posts: 3,427
Likes: 2
From: Fountain Inn, South Carolina
Originally Posted by DrValidus
.
I think it may be the cold air. I live in NYC and my Vette is my daily driver. Yes. LOTSA LOTSA stop and go drivng. And I always use Mobil Super (93 octane)
Thanks for the info
I think it may be the cold air. I live in NYC and my Vette is my daily driver. Yes. LOTSA LOTSA stop and go drivng. And I always use Mobil Super (93 octane)
Thanks for the info
People that park their Vettes during the winter.... start'em up in spring look on the DIC and see.... 75 miles till empty, but have nearly a full tank. It's because they were starting it up in the garage to run.... but never drive it.... Lets see, your burning fuel, but going zero distance
How many mile to the gallon does that equal 
Melting Slicks
Joined: Nov 2004
Posts: 3,495
Likes: 0
From: Paducah Ky
Only had mine a little less than two months now, but am getting around 20 mpg. Not having had it very long I like to feel the power every now and then 
. I was quite surprised at getting that good of mileage with my foot in it so often.
. I was quite surprised at getting that good of mileage with my foot in it so often.
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Brett Foote
Race Director
Joined: Oct 2002
Posts: 11,945
Likes: 12
From: Vancouver
2015 C5 of Year Finalist
St. Jude Donor '05-'06-'07-'08-'09-'10
Man you have a lot of info here to digest. But if your not blowing smoke out the tail pipes then I would say your OK. I get 30 mpg when out on the interstates going for hours on end. In the city I don't even look. It would probably make me slow down.
Team Owner
Joined: Jun 1999
Posts: 41,792
Likes: 153
From: Houston,Texas USA
I get over 20 mpg constantally around town. The only trip I have taken with this car, was to Florida when it had only 300 miles on it. The low for the trip was 30.4 mpg, and a high of 34 mpg. I did see 90 mph, more than once. My car is a stock 4004 six speed coupe.
Race Director
Joined: Oct 2004
Posts: 18,401
Likes: 3
From: Retired but working
Cruise-In VI Veteran
Check your exhaust pipes for a heavy buildup of carbon that's one way of seeing of you are running rich. Could be a couple of 02 sensors not doing their job.
I'm running 450 horse and I get about 22 around town and 31+ out on the road @ 70 with the air on.
Perhaps it needs a road trip. 100 + miles at 70.
I had a 63 SW that I had to take out occasionally just to blow out the garbage.
Averaged 8mpg and 12mpg after
. That's when leaded was 29.9 though.
Best of luck.
I'm running 450 horse and I get about 22 around town and 31+ out on the road @ 70 with the air on.
Perhaps it needs a road trip. 100 + miles at 70.
I had a 63 SW that I had to take out occasionally just to blow out the garbage.
Averaged 8mpg and 12mpg after
. That's when leaded was 29.9 though. Best of luck.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Originally Posted by Tom/99
I get over 20 mpg constantally around town. The only trip I have taken with this car, was to Florida when it had only 300 miles on it. The low for the trip was 30.4 mpg, and a high of 34 mpg. I did see 90 mph, more than once. My car is a stock 4004 six speed coupe.
Must be nice! I cant even get a 2005 Z06 and you already have the 4004! I'm jealous!!!!!
BC
Melting Slicks
Joined: Dec 2003
Posts: 2,340
Likes: 722
From: Chicago N/W Suburbs
My 2001 Convertible Automatic with 2.73 axle ratio gets.....
22-24 local driving (in the suburbs with reasonable traffic)
28-30 on open interstate road, crusing at 70-75
??-?? inner city, stop and go driving
Ron Dittmer
22-24 local driving (in the suburbs with reasonable traffic)
28-30 on open interstate road, crusing at 70-75
??-?? inner city, stop and go driving
Ron Dittmer
Drifting
Joined: Jul 2001
Posts: 1,511
Likes: 1
From: Winter Park Fl
I notice you'r in NY. Maybe it's the winter reformulated gas, it has an effect on milage.
Also maybe a faulty thermostat is not allowing the engine to come up to operating tempature (cold motor = less MPG.
Just a couple of variables that come to mind.
Also maybe a faulty thermostat is not allowing the engine to come up to operating tempature (cold motor = less MPG.
Just a couple of variables that come to mind.
Burning Brakes
Joined: Jun 2004
Posts: 1,220
Likes: 0
From: St. Robert Missouri
Originally Posted by DrValidus
No matter how carefully I drive, my avg. mpg is 14 in city! 18 on highway. How are some of you guys getting over 20mpg???
What the heck is wrong with my Vette?!?????
What the heck is wrong with my Vette?!?????
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 775
Likes: 36
From: Nashville, TN
Originally Posted by Half-Life
i'm right with you DrValidus. i actually average lower than you, 12 city. i thought there was something wrong with the car too but as Bill Curlee stated, our state does indeed use oxygenated gasoline and it does affect our fuel efficency.
and as for highway driving, i also averaging 18mpg. but i'm sure you'll agree with me on this, highway driving anywhere around the NYC area is not equivalent to interstate highway driving. highway driving means the car maintains a constant speed (70mph?) for an extended period of time - unlike NYC hwy driving where we'll hit 70 then have to slow down because some idiot is cruising at 45mph in the left lane! or there's an accident/broken down car every 5 miles. on a good note, just yesterday i made a trip upstate and averaged mid-20's so i wouldn't worry too much about it.
and as for highway driving, i also averaging 18mpg. but i'm sure you'll agree with me on this, highway driving anywhere around the NYC area is not equivalent to interstate highway driving. highway driving means the car maintains a constant speed (70mph?) for an extended period of time - unlike NYC hwy driving where we'll hit 70 then have to slow down because some idiot is cruising at 45mph in the left lane! or there's an accident/broken down car every 5 miles. on a good note, just yesterday i made a trip upstate and averaged mid-20's so i wouldn't worry too much about it.
Thanks for all the input fellas. I love my Vette again.
Pro
Joined: Jun 2004
Posts: 543
Likes: 1
From: Detroit MI
Originally Posted by JamesHan
I have never gotten more than 14 mpg on my z06...usually 12.8. My 00 FRC averaged about 14.6.