cant figure it out - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

wreeseelkins · 09-13-2011, 07:58 AM

To start with I have an 2011 2LT with 2000 miles on it. When I first got it I was getting good gas mileage in town for the first few tanks (17 mpgs). Then it seemed to change overnight....... All the sudden it started getting 12 mpgs. The dealer can't find anything wrong and just told me that 12 was all I was going to get, but couldn't explain why it started out life getting 17.
Recently I discovered oil in the intake so I bought a oil catch can. I had a fuel induction service done to remove the oil from the intake and installed the catch can. Everything went smooth. I reset the gas mileage on the dic, and started home. I got 21 on the trip home! That tank of gas averaged out to get 18 total. The next tank averaged out to be 13.6. It seems to be going right back down again.
I started out as if the catch can was going to solve my problem, but now it doesnt seem so. I guess the increase back to normal was from the fuel induction service.......
Does anyone have any experience with something similar or any suggestions on what to look at or do?

Nvincent4708 · 09-13-2011, 08:01 AM

Lots of stop/start driving can do this. Accompanied with pedal smashing.

When I drive in MD in my SS I get 18-20
When I drive in DE.. 13-14

wreeseelkins · 09-13-2011, 08:05 AM

I do the same drive everyday though, and drive the same way. I drive very easy on the gas trying to get the gas mileage up.

on a different note, where did you get the LSX badge? That looks awesome!

Nvincent4708 · 09-13-2011, 08:09 AM

Quote:

Originally Posted by wreeseelkins

I do the same drive everyday though, and drive the same way. I drive very easy on the gas trying to get the gas mileage up.

on a different note, where did you get the LSX badge? That looks awesome!

found it here

http://www.speedecor.com/gmlsxenalem.html

they also sell on ebay too.

how many miles are on your car as of right now? I know mine with the factory ls3 had crap mileage for the first 2-4k

wreeseelkins · 09-13-2011, 08:18 AM

2000 miles, but like I said the first few tanks was ok then it went down hill. then when I did the induction service it was good for that tank then down hill again.

Nvincent4708 · 09-13-2011, 08:21 AM

Quote:

Originally Posted by wreeseelkins

2000 miles, but like I said the first few tanks was ok then it went down hill. then when I did the induction service it was good for that tank then down hill again.

not too sure honestly.

try to calculate it manually.

maybe the computer is fubarred.

wreeseelkins · 09-13-2011, 08:38 AM

i do it manually at every fill up right now, trying to figure it all out :-(

Nvincent4708 · 09-13-2011, 08:45 AM

Quote:

Originally Posted by wreeseelkins

i do it manually at every fill up right now, trying to figure it all out :-(

me too.

nothing comes to mind other than traffic, stop and starts, and driving under/over the engines efficient RPM's

wreeseelkins · 09-13-2011, 08:47 AM

if i drive over about 17 rpms the gas mileage seems to start dropping......

Nvincent4708 · 09-13-2011, 09:00 AM

Quote:

Originally Posted by wreeseelkins

if i drive over about 17 rpms the gas mileage seems to start dropping......

rpm / mph have a big thing to do with it.

our cars like 60-70mph in last gear.. get great gas milage there..anything else.. bad

casper sc/1ss/rs · 09-13-2011, 09:09 AM

i was getting 16-18 mpg when mine was stock in town and that is mountian land and its also an ss so i dont know, if your keeping your foot out of it

wreeseelkins · 09-13-2011, 09:40 AM

im tempted to do another fuel induction service just to see if the mileage increases like it did last time for about a week......

TheHorse13 · 09-13-2011, 09:56 AM

Quote:

Originally Posted by Nvincent4708

rpm / mph have a big thing to do with it.

our cars like 60-70mph in last gear.. get great gas milage there..anything else.. bad

This is true. I set my cruise control to 70 on the highway (that's the speed limit here btw) and I got 24mpg. 2,400 miles or there abouts on mine.

MrandMrsNinja · 09-13-2011, 10:13 AM

Quote:

Originally Posted by wreeseelkins

I do the same drive everyday though, and drive the same way. I drive very easy on the gas trying to get the gas mileage up.

on a different note, where did you get the LSX badge? That looks awesome!

he also has a LSX engine

one BA engine in a BA car for a BA dude

09-13-2011, 07:58 AM	#1
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	cant figure it out To start with I have an 2011 2LT with 2000 miles on it. When I first got it I was getting good gas mileage in town for the first few tanks (17 mpgs). Then it seemed to change overnight....... All the sudden it started getting 12 mpgs. The dealer can't find anything wrong and just told me that 12 was all I was going to get, but couldn't explain why it started out life getting 17. Recently I discovered oil in the intake so I bought a oil catch can. I had a fuel induction service done to remove the oil from the intake and installed the catch can. Everything went smooth. I reset the gas mileage on the dic, and started home. I got 21 on the trip home! That tank of gas averaged out to get 18 total. The next tank averaged out to be 13.6. It seems to be going right back down again. I started out as if the catch can was going to solve my problem, but now it doesnt seem so. I guess the increase back to normal was from the fuel induction service....... Does anyone have any experience with something similar or any suggestions on what to look at or do?

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09-13-2011, 08:01 AM	#2
Nvincent4708 Drives: N/A Join Date: Nov 2010 Location: N/A Posts: 25,856 View My Garage	Lots of stop/start driving can do this. Accompanied with pedal smashing. When I drive in MD in my SS I get 18-20 When I drive in DE.. 13-14

09-13-2011, 08:05 AM	#3
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	I do the same drive everyday though, and drive the same way. I drive very easy on the gas trying to get the gas mileage up. on a different note, where did you get the LSX badge? That looks awesome!

09-13-2011, 08:18 AM	#5
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	2000 miles, but like I said the first few tanks was ok then it went down hill. then when I did the induction service it was good for that tank then down hill again.

09-13-2011, 08:38 AM	#7
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	i do it manually at every fill up right now, trying to figure it all out :-(

09-13-2011, 08:47 AM	#9
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	if i drive over about 17 rpms the gas mileage seems to start dropping......

09-13-2011, 09:09 AM	#11
casper sc/1ss/rs Drives: 2011 camaro ss vortech supercharged Join Date: Aug 2011 Location: marion VA. Posts: 524 View My Garage	i was getting 16-18 mpg when mine was stock in town and that is mountian land and its also an ss so i dont know, if your keeping your foot out of it

09-13-2011, 09:40 AM	#12
wreeseelkins Reese's Drives: 2011 camaro 1LT Join Date: Aug 2011 Location: tallahassee,florida Posts: 472	im tempted to do another fuel induction service just to see if the mileage increases like it did last time for about a week......