Gas Mileage with/without Range Device
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
Before installation - 8988 miles driven, 415.23 gallons, 21.64 MPG
After installation - 2967 miles driven, 146.04 gallons, 20.31 MPG
I'm 6'2" and have never bumped it in getting in or out of the car. I keep it in the car full-time.
I'm not subject to any emission testing. I've never had a CEL.
After installation - 2967 miles driven, 146.04 gallons, 20.31 MPG
I'm 6'2" and have never bumped it in getting in or out of the car. I keep it in the car full-time.
I'm not subject to any emission testing. I've never had a CEL.
I don't think it has to do with height. More likely the way you swing your leg out. That or it's a sign from the gods I needed to get rid of it which I did, losing half of what I paid for it.
Maybe not but while it doesn't cause a CEL, it prevents the ECM from completing it's readiness testing which I suspect is why you unplug it a few weeks before you test if you need to test. I prefer to not have it that way so I sold it and went to Diablo WHICH IS SOMETHING I SHOULD HAVE DONE IN THE FIRST PLACE.
Last edited by aklim; Sep 30, 2024 at 11:27 AM.
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
I never bought any vehicle with it in mind. Just not one of the concerns. Function is my first priority. That said, if I can get a few extra miles out of what I have, I'm not shy to admit I would not try if it was not something that inconveniences my lifestyle. If electric was as fast charging and as convenient as gas, I'd be there too.
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
So what I see is it will cost a few dollars more at a fillup vs a guess that it may have a possibility of lessening chances of a failure. It is not yet a choice.
Advanced
Joined: Aug 2024
Posts: 86
Likes: 4
From: New Jersey
I managed to kick it out of the car a few times exiting the car. I guess it was a sign it needed to stay out of the car. Went to Diablo for a program so you can increase the throttle tip in when you give it gas and the shifting made firmer. Now I can go to emissions and pass it as long as the car is working right. With the range unit you have to remove it for a bit before the emissions test since it fools the ECM into thinking the system has not completed the readiness testings needed. I don't have to buy the TB mods like Soler TB to get better throttle tip in. Best of all, I don't have to worry about my foot kicking it and damaging the OBD2 port.
Burning Brakes
Joined: Jun 2021
Posts: 801
Likes: 408
From: NC
Some have said not using the AFM system LESSENS the chance for a failure. It is a nice idea but it isn’t at stage 3 of the scientific process where we construct a hypothesis. Maybe a "Hail Mary"? Only way to really fix it seems to be removing the AFM system altogether.
So what I see is it will cost a few dollars more at a fillup vs a guess that it may have a possibility of lessening chances of a failure. It is not yet a choice.
So what I see is it will cost a few dollars more at a fillup vs a guess that it may have a possibility of lessening chances of a failure. It is not yet a choice.
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
The problem with the spring gets stuck when going from compression to open. Mine was on 1 time on day one when delivered then the mode switch was never turned to ECO until I turned it off permanently in the ECM. But what do I know, I am only the french fry manager., but that's where the bucks are.
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Advanced
Joined: Jan 2014
Posts: 61
Likes: 0
From: PV KS 66208 2016 Z51 3LT
"New to me" 2016 Stingray 3LT. Are you saying the AFM could cause issues down the road or the Range thing? I drove it home from the West Coast and around town now for 2 weeks and didn't notice AFM at all. My '17 Acura system was very noticeable.
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
I don't think you will really notice it unless you are looking at the fuel consumption gauge where it shows it. Word is that that switch back and forth can exacerbate things. How much, not sure. My A8 doesn't seem to do it although the gauge says it switches. I would go with the Diablo to program it out so I can also do other things like a better throttle tip in and firmer shifts for a few bucks more.
Burning Brakes
Joined: Sep 2014
Posts: 802
Likes: 348
From: Texas
Recently purchased and installed Range AFM disabler on our 2016 rag top after first 35K miles without.
The "V8 to V4 and back again" always seemed to be pretty seamless with our normal driving habits, but we kept hearing (or imagining we were hearing) a subtle but ominous "grinding" noise at low speed V4 mode when a slight load was on the motor. AFM disabler seems to have eliminated the noise. So far (about 3K miles), we reckon approximately 2-3mpg (we have not checked it closely) more fuel consumption using disabler. The 2016 LT1 is now doing about the same mpg as our 2011 GS LS3.
MPG is not a high priority because of the way we use the car, but we think any car with this capability that will do >20mpg is pretty cool. We remember back in the late Stone Age we had an old friend who had a 1969 C3 L89 "tri-power" car. The L89 made about the same hp as our 2016, but NEVER saw 10 mpg. Of course, the guy hardly drove the '69 gently...
We trudge on.
The "V8 to V4 and back again" always seemed to be pretty seamless with our normal driving habits, but we kept hearing (or imagining we were hearing) a subtle but ominous "grinding" noise at low speed V4 mode when a slight load was on the motor. AFM disabler seems to have eliminated the noise. So far (about 3K miles), we reckon approximately 2-3mpg (we have not checked it closely) more fuel consumption using disabler. The 2016 LT1 is now doing about the same mpg as our 2011 GS LS3.
MPG is not a high priority because of the way we use the car, but we think any car with this capability that will do >20mpg is pretty cool. We remember back in the late Stone Age we had an old friend who had a 1969 C3 L89 "tri-power" car. The L89 made about the same hp as our 2016, but NEVER saw 10 mpg. Of course, the guy hardly drove the '69 gently...
We trudge on.
Melting Slicks
Joined: Nov 2002
Posts: 2,773
Likes: 299
From: Land of the fruits and nuts
Cruise-In IV Veteran
Cruise-In V Veteran
Couple of things here . One , I have fuse 42 pulled out and I can definitely hear the exhaust change sounds which drove me crazy !
Two , I took it for a 100 mile trip and when I got tired of hearing the exhaust change I just pulled the shifter down to "M" and it stayed in V-8.
I will have to take it out for the stupid smog text in a couple of years !
Two , I took it for a 100 mile trip and when I got tired of hearing the exhaust change I just pulled the shifter down to "M" and it stayed in V-8.
I will have to take it out for the stupid smog text in a couple of years !
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
Couple of things here . One , I have fuse 42 pulled out and I can definitely hear the exhaust change sounds which drove me crazy !
Two , I took it for a 100 mile trip and when I got tired of hearing the exhaust change I just pulled the shifter down to "M" and it stayed in V-8.
I will have to take it out for the stupid smog text in a couple of years !
Two , I took it for a 100 mile trip and when I got tired of hearing the exhaust change I just pulled the shifter down to "M" and it stayed in V-8.
I will have to take it out for the stupid smog text in a couple of years !
Melting Slicks
Joined: Oct 2022
Posts: 2,728
Likes: 2,221
From: Phoenix, Arizona
2025 C7 of the Year Finalist- Unmodified
2024 C7 of the Year Finalist - Unmodified
i'm not driving for best mileage but i've logged gassing-up for years, which does give mileage since last fill up!!
09/22/2024
20.3 MPG
08/03/2024
21.4 MPG
06/22/2024
21.3 MPG
05/18/2024
22.1 MPG
05/04/2024
20.3 MPG
04/16/2024
21.5
Costco
19001 N 27th Ave09/22/2024
$45.94
20518 mi20.3 MPG
Costco
19001 N 27th Ave08/03/2024
$44.35
20266 mi21.4 MPG
Costco
19001 N 27th Ave06/22/2024
$41.13
20013 mi21.3 MPG
Costco
19001 N 27th Ave05/18/2024
$47.43
19797 mi22.1 MPG
Costco
19001 N 27th Ave05/04/2024
$42.70
19559 mi20.3 MPG
Costco
19001 N 27th Ave04/16/2024
$47.91
19366 mi21.5
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
Melting Slicks
Joined: Oct 2022
Posts: 2,728
Likes: 2,221
From: Phoenix, Arizona
2025 C7 of the Year Finalist- Unmodified
2024 C7 of the Year Finalist - Unmodified
Team Owner
Joined: Jul 2004
Posts: 28,357
Likes: 3,253
From: Hartford WI
I get a bit more. 23 and a little change but I have a lot of cruising that I do at 80. Not too wise to do triple digits stretches since that exposes you and increases your chances of getting caught especially on a lonely road where the cops know people like to hit it.
