I'm getting really bad gas mileage.....well, I think it's bad....190-220 on a tank.....It's a v-6.....and I don't floor it.......I bought some stuff to pour on my gas tank to clean the injectors.....any other ideas??? What kind of mileage do you guys get? BTW, my car is stock...... thanks

 

Just so as you know, chemical cleaners are bad for Multec style injectors. They're self cleaning and don't need to be serviced.
The numbers I have are fro the 3.1 in the Firebird... auto city 18, highway 27, manual are the same.

Incidently here are all the ratings for the 91 Firebird...

5.7L 16/24
5.0L tpi manual 16/26
5.0L tpi auto 17/24
5.0L TBI manual 17/25
5.0L TBI auto 17/26
3.1L 18/27

So much for the myths that the TBI and V6's get such better mileage than the L98's. Hell I'd imagine that the differences are so small that it matters more how you drive the car then the cars rated gas mileage. Kinda makes sense since my L98 gets better mileage than my LH0

 

I push 30+ MPG. I generally go to 320 miles before fill up and I am still WELL above E (Usually I put in 10-10.5 gallons). When I did not pay attention and ran it dry once I refilled at 376? or very close to it. Was a couple years ago forget the exact number but that seems right. And that WAS ALL city driving.

As for how you can improve yours. Do a tune up. Check your plugs every once in a while. The biggest thing is your timing. Make sure it stays around 12-14* with the ESC thing unplugged. Check the codes for your comp about 2 times a month so you can stay on top of things that are going bad or are thinking of going bad. If you have not replaced the O2 sensor or can not remember when it was changed last replace it. 21 bucks.

 

Don't argue with me. If you want to dispute the printed facts I posted here, take it up with Pontiac Customer service and the EPA. I SERIOUSLY doubt GM is going to advertise a car has worse gas mileage then its true mileage.

And I can't help but find it funny that my 91 L98, 91 L03, and 91 LH0 all match these specs that Pontiac placed on window stickers, yet your superhuman 3.1 gets 27mpg in the city when thats almost 10mpg more than GM rated it as.

Put down the crack pipe.

 

Drew get over yourself. Why is that you argue every post I put up? I posted MY NUMBERS. And guess what My car does regualry get over 30 MPG. I was not putting that reply to flame you. Personally I think you are a V6 troll. You have an 8er. stay outta the V6 boards. I do not see how you got the Moderator position with all the slams you have put put in the V6 boards.

 

Funny, I find you replying to more threads arguing with my posts (here and on other boards) then the other way around. Fact is we don't like each other. I became a moderator cause I know what I'm talking about when it comes to history and restoration and I've been around forever. You post more speculation and dreaming then anything else. I post from experiance and documentation. If you don't like it fine, but don't go around debating everything posted that I can and will back up.
You think I'm a troll, I think I'm one of a few people that have actually done anything serious with a V6 thirdgen. Most people that actually work with thier cars have V8's. I however enjoy all of them. I wouldn't try to make a V6 perform, but that doesn't mean I'm a troll. Personally i think you post more misinformation to perpetuate and encourage people to try to make drivers perform like racecars when they never will be able to do both at the same time. A v6 can be made to perform, but the 60* V6's won't hold up long as a daily driver without a more serious investment then involved with a V8 swap.

Regardless neither of us is goign anywhere, and if you continue to push the issue I'll go out of my way to have you removed.

 

Drew, I aggree the TBI cars get just as good of milage as out
V-6's. But the TPI is a little overdone there. If you get this milage good for you, and I must congradulate you on it. Everyone I know around my area gets 15-17 on average with there TPI, some get 20, I have never heard of 24-26, with a TPI. My car gets between 550 and 600km to a tank.

I understand that these are GM sticker #'s. But I have never seen TPI give great fuel milage just great power.

I was wondering what do your cars give for fuel milage, vs Pontiacs #'s. Just to compare, to clear this situation up.

90CamaroRSGuy16
You should be seeing around 25mpg with your car.

 

EDIT: The post I was replying to has been dealt with... /Edit

My experiances with my thirdgens have been in line with the numbers I posted, which btw are exactly quoted from a Pontiac publication dated 1990. If you don't like it, I'm sorry thats what it says. I didn't come up with the numbers I only passed them on.

 

What we also need to take into account are the mods that are done to these cars. Many pepole here have an aftermarket exhuast and intake setup. A long with other minor mods this has increased my MPG to around 28 - 30.

Before I did anything to my 3rdgen my MPG was more in line with the numbers published by GM. All though it was 2 - 3 MPG better then published numbers, but every car is slightly different.

28 - 30 MPG on a 3.1L is not impossible. Just not on a stock steup.

 

My 92 3.1 typically gets 26-30 on straight highway driving. The 30 is without running the a/c and keeping the windows closed. Open windows really screw up aerodynamics.

With a/c and running 75-80 (70's the limit here in most of FL interstates), I'll hit 26 - 27.5. I reset the trip odometer with every fillup (or did, until my speedo/odo started refusing to run for the first couple of miles each trip...see post on Electronics board) and run a quick mpg calc everytime I refill. 350 miles generally translates to about 12.5 - 13.5 gallons.

I almost never run pure city/in-town type driving, due to my job, but the absolute worst I've ever gotten was 21. That was on a tank where I did almost nothing but very short hop, local trips, during the summer with the a/c blasting away.

I'm a bit older than the average poster here (48), and I neither street race nor zip around like the ricers, but I'm not exactly Granpa either. At a light, I'm always the first off at green and get up to speed limit asap. But I don't think I've actually floored it since I test drove it before buying.

Simple common sense with the gas pedal, keeping the car in good tune, running good gas (I use only 87 octane, BTW) and not hauling around unnecessary weight goes a long ways towards improving gas mileage.

And while I don't intend to disagree with Drew, I will say that many of the cars I've owned in my lifetime have exceeded the EPA window sticker mileage numbers - those are derived from an EPA mandated test run that doesn't accurately reflect real world conditions.

Hope this lends some info to the issue and doesn't fan the flames, as that certainly isn't my intention.
T

 

Ok, Now that I know what I should be getting.......how can I increase my mileage? I don't floor my car, and most of my driving is city...... I usually fill up between 170-220.....but, I'm not sure if my gauge reads right. Sometimes I'll have 6 gallons of gas left in the tank.....still for a v-6....I should be getting better than I am ( I think) So any tips would be helpful. Thanks....

 

When was the last time your car had a complete Tune-up? A tune up will increase your Fuel milage. TomP the master of Tune-ups has a TUNE-UP thread; Here it is https://www.thirdgen.org/messgboard/...ML/000545.html

 

Sorry but I gotta call BS on you getting 30 mpg city. I get 25-27 mpg HIGHWAY. Some 4 cylinders don't get 30mpg city.

Do you live out in the boondocks where there isn't a stop for miles?? That doesn't count as "city" driving. Come out to LA and see what kinda city mileage you get.

 

just as a general rule of thumb, performance engines get bad gas milage. if u get 20+ mpg from a camaro v6 or v8, then ur doin good. how u drive does have alot to do with it. w/ the 91 i would get between 13 (hard driving, street racing) - 22 (easy take offs, freeway driving). yes every car, every engine is different. are 30+ mpg in a v6 camaro possible, yes. is 10- mpg possible, yes. i hope this helps some.

mike (loomdog)

 

I usually get around 30mpg on 87 octane. Most of it is highway (65mph +/-) but I am not too gentle on the gas pedal when I am in the city. My worst was 21mpg when I was driving about 5mi a day with a heavy foot.

In my opinion, the EPA numbers are just an average/guideline. All of the vehicles in my family average above the EPA numbers.

Just my $0.02

 

I can believe getting close to 30 on the highway , I probably get close to that with my 89 bird w/2.8.

But If you think that I would believe that you could get 30mpg in the city than someone better pinch you and wake you up. I dont care what kind of mods you have done to the car, unless you have an electric engine back up .
A GEO METRO hardly gets that in the city.
Camaro_hunter_d you better check your post , I think you screwed up . Believe me I'm not trying to flame you ,I just think you made an honest mistake.

BTW I average about 22 to 25 mpg with my bird and I live in a rural area .

 

Ok not to get in an argument but Drew Gm doesent test the milage of thier cars. Its done by indipendant testing so Gm doesent post thier numbers, they post the numbers that place gets. For the life of me I cant think of that name though. Nice to see the posted numbers.
I know two people that make me upset one has a 2.8 carbed 5speed and he swears 35+ highway another has a 89rs 305 auto and gets 30 mpg highway.
The best I ever got with a 2.8 was 19 city 26 highway and with the 3.4 19 city and 27 highway.
SSC

 

Camaro_hunter_d,

Do you have stock size wheels and tires?

 

Oh man! I wish I got 30 mpg! I get 20 on my BEST days of stop and go traffic. I barely do highway so I really don't know what I get there. But usually in stop and go traffic I get about 17mpg with a lead foot. Oh, I usually get 220-240 miles on a tank of gas.

 

How old are you again?

 

I get 30 MPG+ on highway itis possible i avg 20-25 MPG thats city/Highway driving and its in LA traffic soo i think my car gets damn good milage for 194,000 miles

 

Yeah, but he says he gets 30mpg CITY which is rediculous. Maybe if he lives out in the boonies where his closest neighbor is 3 miles away..............

 

Old enough to know that I don't have to put up with people flaming me and calling me a troll on a website that I contribute heavily to.

 

oh didnt see that part. Maybe he lives in a city with 2 buildings and open roads all over

 

Drew
Moderator



Registered: Jul 1999
Posts: 6319
personally I think you're a bloomin' idiot...
I post information to be helpfull based on what I know and what my resources say. If you don't like it and can prove its wrong, post your opinion, but give up on trying to slander me. If you want to get into a pissing contest with me you'll find yourself banned from thirdgen.org. I don't mind a healthy debate but it gets old when you reply to everything I post sayign I'm a troll. I'm not going to tolerate it and I am a contributer to this website and am in constant contact with the owner. So you decide what you want to do next.
__________________
Drew
predatorman@hotmail.com
83 Camaro 5.0L *1995-98*
87 Iroc 5.7L
91 Formula 5.7L 14.3@98mph
91 RS Convertible 5.0L
91 Firebird 3.1L 17.00@82mph *Gtech*
92 S10 2.8L
98 Grand Am GT 3100
Parts for sale


Drew as pertaining to that joke of a private message you sent me Which I will be forwarding to others. But anyway, I was not FLAMING you. As I said I posted WHAT MY CAR GETS. PERIOD. And I think people after reading this will find that you really do not care about the V6 Board cause you have posted more detrimental threads then helpfull ones. I have not argued with you on any other board because THIS is the board I HANG AT!.

Now unless you OWN MY CAR, PUT GAS IN MY CAR or DRIVE MY CAR how the heck are YOU going to know what MPG it gets?????. Are you gifted? GM posts the best numbers it can get to promote certain cars. Obviously the 8's they are going to post MPG #'s of these thing traveling down hill with nothing on so they are higher. The V6's they are gonna try to rag everything they can. Now If YOU want to continue being childish go for it. I was posting the number I GET. I actually take care of my car and keep it in proper tune and condition so it does perform its best. And I like your latest "Contribution" of trying to pedal off injectors.!

 

Sorry I did not see this before.. I have 195/60/15 Front and 225/60/15 Rear. But I just pu those rears on, before they were 205/60/15.

 

Well you do the math. I refilled the other day and put in 10.752 gallons. I had gone 324.8 miles. This WAS MIXED driving. Thats better then 30 MPG. I do live in a rather flat area, few hills and I have a 5 speed which helps out alot I know. Autos ARE worse on gas.

 

Pissing contest it is then... so noted.

You made this personal, and thats not what this board is for. Its for sharing opinions. My V6 experiances have left me with a negative opinion of the cars, and I think my opinion has merit. If you're saying that I can't post on this board because I say bad things about the V6, so what? Who cares? If its so great than my occasional criticism isn't going to hurt anyones feelings.

I have as much right as anyone else to post on this board. I own a V6, and I've paid my dues. I took the car from a junkyard and turned it into a daily driver. That gives me a unique look at these cars that many members on this board don't have. And I intend to share the experiance. I'm not going to let you or anyone tell me I can't post here because it makes you feel bad about your car, or for whatever reason it makes you feel bad about yourself. Deal with it. Dragging me thru the dirt on a website isn't going to make your car faster or you look any smarter, it only wastes your time and makes you look like a bloomin' idiot.

Yes, this thread has been forwarded to the administrators and moderators.

 

As for the injectors I have for sale, I'm offering a service, not unlike these magical headers you've been advertising here for the last month or more. Again if you don't like it, tough. You're not in charge of this board.

 

LMAO @ drew!!!!!

hey drew bud, i gotta go with you on this one..........i have a 5 speed 3.1 and took a trip ALL THE WAY FROM THE VERY TIP OF NORTH JERSEY TO THE VERY TIP OF SOUTH JERSEY on one main highway called the GS PARKWAY................., i then bought gas and calculated my MPG..................

DRUM ROLL, FRED!......................................


19 MPG

all hiway 5 speed

 

Best I ever got was 22 MPG w/ my auto. Mods should be considered as well as gearing changes.

There is no reason to argue on this isssue.....cars get different mileage because of different driving styles and mods.

My friend's L98 Vert (yes L98) gets 30+mpg with his 2.73's. Computer programming as well can change gas mileage. Just as GlennL98GTA.

CamaroHunter and Drew, it would be appreciated if you could keep the arguing off the public boards and resort to PM or email. Drew stated what GM published, and Camaro stated what he says he got. I see where both of you are coming from, yet still see no need to argue. Both of you are contributing members here and have been for a while. I know neither of you are trolls, and neither of you should accuse the other of being one. Thanks.

Post locked to avoid further bickering. If you have a problem with that, feel free to email me at Ovrclck350@aol.com and suggest a reason for me to open the thread back up. Original poster has already attained his answer.