what kind of gas mileage are you getting?

[Squint]

Hi, I'm just curious at what kind of MPG (miles per gallon) or how many miles you are getting per full tank?

please list mods and type of driving

I'm currently getting around 210-230 miles per full tank, i fill my tank with exactly 11 gallons of 92 octane. thats what 20 bucks buy in hawaii.

right now i have just an intake, 2.5 dp and 3in full piping catback

car is just used for transportation, once in a while i would just sample it a few times.

 

[DGajre777]

I get about 16 MPG, but I know I'm running pig rich. I get 180 miles for 11 gallons of fuel. I have 59,030 miles, changed my fuel filter a few months ago, stock pump, injectors, unknown psi of boost.

 

[Prodigyman]

I get about 16 MPG, but I know I'm running pig rich. I get 180 miles for 11 gallons of fuel. I have 59,030 miles, changed my fuel filter a few months ago, stock pump, injectors, unknown psi of boost.

Ouch! I am sick and tired of spending 60 Bux at the pump, drive for 5 days and do the same thing twice a week. My car not even that fast ATM

 

[TSIMonsteR]

When I first got the car, all the emissions stuff was deleted/blocked off (except the cat). I was getting about 20mpg then. I had to reconnect/install all of it to pass inspection. Since I have seen an avg of 27mpg on 93 the past month!! A little over 300 miles per 11-12 gallons

This is in an auto too, so you should be getting much better mpg.

 

[president95]

http://www.dsmtuners.com/forums/showthread.php?t=124669

Maybe you can compare with this.

 

[nightspeed87]

before i swapped to gst my n/t motor was getting horrible gas milage because of a bad o2 and because the engine was so worn, because i hear worn and old engines burn more. It hard to tell what my gas milages are though because its so random sometimes feels like i can drive on it for a while without loosing too much gas and sometiems feels like if i mash it a couple times it sucks gas in minutes . I know road conditions, temperature, tuning, and maintaince all are importance factors to gas milage also though. But dsms arent that bad for gas milage considering we are only 4 bangers, could be worse, could have a v6 or 8 and suck gas like crazy even without turbos.

 

[2gGSX]

I got a consistent 20 mpg when the car was stock/near stock, and now I get 23.

 

[2GeNTSi]

I get arund 320 to the tank with mixed city/highway driving. 350-400 if mostly highway. This is on a 14B w/ supporting mods.

 

[VicBoost]

Okay well here it goes guys i haven't checked my gas mileage lately well anyways i went to gas station and over here in winnipeg its a damn rip off!! Its $1.24 a L for premimum. So anyways i put $30 in the tank at 253 and it lasted till 455, so thats 200km on aboout 24L of gas. You guys think its good. Mods running are stock t25, ram air intake, 2.5" DP and exhaust, HKS Universal BOV, also new 18" black wheels with chrome lip and new tires.......

 

[andymoraitis]

I get 19.5 mpg unless something in my calculations is off. I based my numbers on the following conversions:

1 km = .621 miles
1 gallon = 3.78 litres

124 miles on 6.35 gallons = ~19.5 mpg.

Wow, even I do better than that.

 

[brute]

120 miles with 6.24 gallons...

about 19.2 miles per gallon
about 8.3 kilom per liter

It's not too bad, but it should be better. My car is a gas hog. And even with a couple WOT's, I still get like 23 or 24 miles a gallon. Check for gas leaks or try replacing your o2 sensor (if it hasn't been replaced in a while). Then again, the bad mileage may be resulting from the larger wheels.

Edit: GRRR stupid Andy beating me yet again.

 

[VicBoost]

Errr i know its not that bad but still andy beating me.... Whats best way to get good gas mileage changing 02 sensor? I really dont' drive my car that much but still...are there any tutorials where i can learn how to get good gas mileage...I just forgot i stopped when the gas light sign showed up, and it usually shows up when there is still 1/4 left still. Which is still good for another 100k or more since i tried it a couple times...

Vic

 

[andymoraitis]

Vic,

What makes your setup difficult is the fact that you're on the factory air/fuel maps. These run the motor rich to protect it and are fixed at a 9.5:1 A/F ratio under boost. You can replace the O2 sensor if you're not sure when it was last done as a precaution but the motor will still run fairly rich. The only time an O2 failure will show up is if you mileage drops drastically and the car falls flat on it's face. Typically, they'll read lean when the fail and dump tons of fuel to compensate.

The one thing you could try is an EPROM ECU with a custom map that's leaner at say 11:1, but that'll run you close to 360.00 for everything and it would take considerable time for you to make that back. The other option is to turn down the fuel pressure with an AFPR to around 40 instead of 43 and this will also lean the motor out a bit. I wouldn't try this without a logger or a way to read knock though.

For reference, I get 28-29 on the highway and around 22-23 in the city and I hit big boost very often. You have options, but none of them are cheap.

Sorry!

Andy

 

[VicBoost]

Vic,

What makes your setup difficult is the fact that you're on the factory air/fuel maps. These run the motor rich to protect it and are fixed at a 9.5:1 A/F ratio under boost. You can replace the O2 sensor if you're not sure when it was last done as a precaution but the motor will still run fairly rich. The only time an O2 failure will show up is if you mileage drops drastically and the car falls flat on it's face. Typically, they'll read lean when the fail and dump tons of fuel to compensate.

The one thing you could try is an EPROM ECU with a custom map that's leaner at say 11:1, but that'll run you close to 360.00 for everything and it would take considerable time for you to make that back. The other option is to turn down the fuel pressure with an AFPR to around 40 instead of 43 and this will also lean the motor out a bit. I wouldn't try this without a logger or a way to read knock though.

For reference, I get 28-29 on the highway and around 22-23 in the city and I hit big boost very often. You have options, but none of them are cheap.

Sorry!

Andy

Hmm so i'm running factory air/feul mods...so when i change my fuel mods will it help?. I will be getting 16g, bigger injectors probably 199 walboro, change my o2 sensor. Also i noticed my air filter and feul pump is dirty i should change that as well. Just wondering your running way more mods and boost and you still are getting better mileage then.... why is that

 

[2gGSX]

Altered fuel maps and timing maps of course. I've been getting 24 mpg mixed, but I also have a REALLY obscure timing setup (no fuel adjustments except the global comp for injectors then +7 or 8* of timing from 2000 to redline). Only knock I ever see is partial throttle off-boost for some reason. If you ever get further in mods, be sure to set your fuel trims first. Mine are at about 2%, which is one of the reasons I attribute my mileage to.

Also, word on the DSMLink boards is that a simulated narrowband reading from a wideband O2 setup actually increases gas mileage as well. I haven't gotten to installing my PLX M250 yet, but I'll find out soon I hope.

 

[stockfornow]

I'm sorry to go offtopic, but I'm also looking to get better gas mileage. I just about 20 to 21 mpg tops. I was wondering what would it take me with a 57 trim turbo, MAF T, 720's, and stock internals? Would I have to get something else to controll my A/F mix? Thanks for any help, otherwise just ignore me.

 

[brute]

Wideband o2 sensor.

 

[stockfornow]

But I have checked my o2 sensor and it works just fine (logger).

 

[2gGSX]

Better injector compensation (deadtime adjustment) and fuel trim adjustment would be my guess.

 

[fourreGsixty3]

Vic,
Changing the fuel mods will not change up the a/f ratio, no matter what you do it will always be 9.5:1 a/f ratio unless you get a SAFC or DSMLink with a logger, and an eprom'd ecu with the link. This will allow you to lean out the motor to an 11:1 ratio that Andy was talking about. Cleaning the air filter wont hurt you by any means, and changing the fuel filter, and o2 sensor wont hurt as well.Also if you do get a Wally 190 rewire it, when you get the E3 16G get 550cc injectors, but with the larger injectors you will need a logger, if you go with a DSMLink(my vote) then go with 720cc injectors, so you get lower IDCs and more room for upgrades, and tuning. Just my .02
PS I wish I got as good of gas mileage as you guys...when I was allowed to drive I calculated itout that I got 17 mpg on highway, and 13 mpg in city...or less, but that was probably just because of my driving habits...WOT and 4.5k -redline shifts, haha. Parenets, and cops say I have a "lead" foot, I think its all a lie .

Dustin

 

[VicBoost]

Vic,
Changing the fuel mods will not change up the a/f ratio, no matter what you do it will always be 9.5:1 a/f ratio unless you get a SAFC or DSMLink with a logger, and an eprom'd ecu with the link. This will allow you to lean out the motor to an 11:1 ratio that Andy was talking about. Cleaning the air filter wont hurt you by any means, and changing the fuel filter, and o2 sensor wont hurt as well.Also if you do get a Wally 190 rewire it, when you get the E3 16G get 550cc injectors, but with the larger injectors you will need a logger, if you go with a DSMLink(my vote) then go with 720cc injectors, so you get lower IDCs and more room for upgrades, and tuning. Just my .02
PS I wish I got as good of gas mileage as you guys...when I was allowed to drive I calculated itout that I got 17 mpg on highway, and 13 mpg in city...or less, but that was probably just because of my driving habits...WOT and 4.5k -redline shifts, haha. Parenets, and cops say I have a "lead" foot, I think its all a lie .

Dustin

So its technology....... well when i do get bigger injectors i will probably get an safc or dsmlink probably dsm link. So technology is the best way to get gas mileage by the looks of it.....WTF

 

[dieseltech]

Well I dont' have a turbo car but i do get good mileage. I get almost 30mpg on the highway. You guys are all forgetting the basics for good mileage. Check spark plugs and gap. Check compression. If your compression isn't in specifications you won't get good mileage no matter what you do because the fuel/air mixture isn't being burned properly. Air filter, fuel filter. Heck even proper inflation pressure on your tires is important. It's so important that the government is mandating the automakers monitor tire pressure and setting the check engine light because it effects gas mileage . Fresh Fluids can also help to an extent. Just do your basic checks to make sure your car is running the way it's supposed to.

Edit: Your new wheels can even be effecting your mileage. If they are a heavy wheel it's taking more power to get them rolling. Of course it takes more power to get the car rolling than to keep it rolling. So the wheels will effect in town mileage more so than highway mileage

 

[andymoraitis]

I agree with you 1000%, but even in the case of a well tuned motor, that factory A/F ratio is simply horrible. I know it's there for safety purposes, but it's quite the pig. Having owned a 95 GS, I can vouch for the great gas mileage. I used to see 32-33 on the highway and 28 running around town. Sure do miss that car!

 

[Trucloner11]

yea i have a gs and i get about 30-33 mpg all around...

 

[JLangevin]

WOW! We have gas idiot lights? ... mine has never come on, and Ive ran the thing until the needle wouldnt move anymore... Ive even had the car sputter on me from running too low on gas, and never had the light come on...

In any case, I suffer from roughly the same milage... I drive about 25miles each way to work and get about 3 trips before she is dry... these are all highway miles, and I do not hot rod the car where ever I go.... I DO have a logger, and my O2 sensors are operating WELL within normal range. If yo do the math, 3 trips is also 150 miles to the tank, but I only get about 11.5 gallons when I fill.... from what I understand 2gs have a 12gal tank, and that equates to 13mpg... thats horrible.

So, I feel your pain, I finally gave up looking for the problem and just deal with it, the car does run fine...

 

[spades_gsx]

from what I understand 2gs have a 12gal tank, and that equates to 13mpg... thats horrible.

So, I feel your pain, I finally gave up looking for the problem and just deal with it, the car does run fine...

2g's DO NOT have 12 gallon tanks!

2g's have 17gallon tanks (16.9)