Instant MPG accuracy check
Thread Starter
Former Vendor
Joined: Mar 2012
Posts: 228
Likes: 0
From: Peoria AZ
Instant MPG accuracy check
I headed South toward the border today and while I was down there having fun, I thought I'd better check my MPG reading, in case I needed gas before I got back home.
Kinda give me a little slack for the pic quality. Those damn Mexican roads aren't real smooth.
So does this look about right with the cruise control on? I was expecting a little more at only 3000 RPM.
Yeah, the airbag light is still on.
Kinda give me a little slack for the pic quality. Those damn Mexican roads aren't real smooth.
So does this look about right with the cruise control on? I was expecting a little more at only 3000 RPM.
Yeah, the airbag light is still on.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
I'm sure you'd have to turn T/C off or else it the motor would just bog. I assume the speedo is reporting information from the front wheel speed sensors, so your instant fuel economy should read 0mpg.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
I'm just trying to see the real world relationship of the aerodynamics to the mileage as the speed increases.
Melting Slicks
Joined: Sep 2008
Posts: 2,286
Likes: 4
I headed South toward the border today and while I was down there having fun, I thought I'd better check my MPG reading, in case I needed gas before I got back home.
Kinda give me a little slack for the pic quality. Those damn Mexican roads aren't real smooth.
So does this look about right with the cruise control on? I was expecting a little more at only 3000 RPM.
Yeah, the airbag light is still on.
Kinda give me a little slack for the pic quality. Those damn Mexican roads aren't real smooth.
So does this look about right with the cruise control on? I was expecting a little more at only 3000 RPM.
Yeah, the airbag light is still on.
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Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
I've noticed my airbag light comes on as well at 130.
This was done on an airstrip rental.
I should have had my instant MPG on the DIC..that would have been interesting!
I can say, since I track each tank of fuel, that particular tank, with 3 180+ runs and a drag strip run on the way home, got 16.34 mpg (including the long drive to/from the air strip) vs. my average at that time of around 19 or so.
I have one tank that I burned completely at Sebring when the car was bone stock, that tank was 8.37 MPG!
This was done on an airstrip rental.
I should have had my instant MPG on the DIC..that would have been interesting!
I can say, since I track each tank of fuel, that particular tank, with 3 180+ runs and a drag strip run on the way home, got 16.34 mpg (including the long drive to/from the air strip) vs. my average at that time of around 19 or so.
I have one tank that I burned completely at Sebring when the car was bone stock, that tank was 8.37 MPG!
Team Owner
Joined: Sep 2000
Posts: 25,007
Likes: 2,707
From: Far NW 'burbs of Chicago
St. Jude Donor '13
While driving along a really flat, straight, deserted road in Florida; I did multiple tests of the mpg at 40, 60, 80 mph. That was on our 2006 and I don't have the numbers any more, but there was a big dropoff in mpg even from 40 to 80.
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
I've noticed my airbag light comes on as well at 130.
This was done on an airstrip rental.
I should have had my instant MPG on the DIC..that would have been interesting!
I can say, since I track each tank of fuel, that particular tank, with 3 180+ runs and a drag strip run on the way home, got 16.34 mpg (including the long drive to/from the air strip) vs. my average at that time of around 19 or so.
I have one tank that I burned completely at Sebring when the car was bone stock, that tank was 8.37 MPG!
This was done on an airstrip rental.
I should have had my instant MPG on the DIC..that would have been interesting!
I can say, since I track each tank of fuel, that particular tank, with 3 180+ runs and a drag strip run on the way home, got 16.34 mpg (including the long drive to/from the air strip) vs. my average at that time of around 19 or so.
I have one tank that I burned completely at Sebring when the car was bone stock, that tank was 8.37 MPG!
or could be the constant g force on the seat sensors.-Carl
Drifting
Joined: Apr 2001
Posts: 1,779
Likes: 6
From: LOS ANGELES CA.
2009
My 09 with the Z51 pkg. averages 13.0 MPG.That's a combination of city and freeway driving.I don't drive my car hard,but the MPG isn't that good.My 06 got 16 MPG average city and freeway griving.Oh well I guess I'll grin and bare it.
Advanced
Joined: May 2008
Posts: 81
Likes: 0
From: Suffolk VA
I usually average low 20's, averaged 30.1 on a 2500 mile trip i just took (with average speed of 73.5 mph, one tank was 37mpg average (Going up and over the cont divide at 80mph, this car seems to like high alt)
Burning Brakes
Joined: Nov 2009
Posts: 1,114
Likes: 42
From: California
I found my instant MPG to read 2 MPG high over the course of 2000 mi.
Tire sizes probably have a bit to do with it...I saw 30 MPG on the DIC for most of the trip. Fuel reciepts reported 28 MPG, with an 80mph ave. speed.
Tire sizes probably have a bit to do with it...I saw 30 MPG on the DIC for most of the trip. Fuel reciepts reported 28 MPG, with an 80mph ave. speed.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 807
From: West coast CA
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Here's my expanded diff view, it's on the top.
Team Owner
Joined: Sep 2000
Posts: 25,007
Likes: 2,707
From: Far NW 'burbs of Chicago
St. Jude Donor '13
