a/t gas mileage

DSMeclipse4G63 · 12-27-2004, 09:37 AM

I was wondering what you guys are getting for gas mileage, as I just purchased a a/t gsx about a month ago. I have averaged around 300 to a tank give or take 50 miles. Mods are as follows; k and n oem replacment, lower ic, intake pipe free mod.
ANdrew

kyledykstra · 12-27-2004, 02:12 PM

I've got a '93 AWD w/6 bolt, Walbro 255, and hard upper/lower IC piping, best I've gotten is 27 MPG all interstate, worst is 20, that's all city, and lots of taking off fast. On average, I'll get 24-25MPG with mixed highway/city.

m1nd64m3 · 12-27-2004, 02:59 PM

I get like 200 miles to the tank and 220 if i am lucky. Its not the way i drive either my milage just sucks.

booosting92tsi · 12-27-2004, 03:40 PM

I have a 92 tsi a/t , I get 225 miles to the tank in city driving, 250 highway......

I have the following:

upgraded from 13g to 14b
upgraded from 390cc to 450cc
full turbo-back 2.5" mandrel bent exhaust, no cat but racing pipe.
stock boost
3" intake with k&n and 2.5" UICP w/ stock bov.

I think my gas milage sucks due to the air/fuel mixture, since i went from 13g/390cc to 14b/450cc, but i kept my ORIGINAL ecu, i need to go with a M/T ecu so it can work with my 14b/450cc configuration.

the a/t ecu still thinks that i have the original configuration 390cc/13g............

any one agree or disagree with me????

kyledykstra · 12-27-2004, 05:26 PM

Quote:

Originally Posted by booosting92tsi

I have a 92 tsi a/t , I get 225 miles to the tank in city driving, 250 highway......

I have the following:

upgraded from 13g to 14b
upgraded from 390cc to 450cc
full turbo-back 2.5" mandrel bent exhaust, no cat but racing pipe.
stock boost
3" intake with k&n and 2.5" UICP w/ stock bov.

I think my gas milage sucks due to the air/fuel mixture, since i went from 13g/390cc to 14b/450cc, but i kept my ORIGINAL ecu, i need to go with a M/T ecu so it can work with my 14b/450cc configuration.

the a/t ecu still thinks that i have the original configuration 390cc/13g............

any one agree or disagree with me????

oh yea... I forgot, my engine has M/T cams, 450's, and a 14B. (rebuilt head too), with the A/T ECU. I typically fill up around 250 miles, get about 10 gallons in.

(yes, get a MT ACU, I'm just waiting for springtime to put my 1990 MT ECU in so mine will run right again)

*edit* I also have all my EGR and vacuum hoses (minus BCS) gone as well, since that apparently affects mileage

JTURBOGSX · 12-27-2004, 06:23 PM

150-200 Depends if I floor it

DSMeclipse4G63 · 12-28-2004, 07:48 AM

so it isnt just me getting bad mileage....I thought something was wrong. I am going to unload all the junk out of my car fillup and chek my full mileage again see if I can break 300 with normal everyday driving.

Defiant · 12-29-2004, 06:37 AM

MILES
PER
GALLON.
Jesus, where do you guys get this "miles per tank" CRAP?
ESPECIALLY with the known-to-be-flakey-as-hell DSM fuel gauge?

maui6651 · 12-30-2004, 10:55 PM

Quote:

Originally Posted by m1nd64m3

its easier to just go by how many miles you went on a tank, so you dont have to calculate anything to figure out mpg.

The big problem though is that no one adds the same quantity of gas everytime they fill up. How hard is it to divide 2 numbers?

To answer the original question, I get about 20mpg on average. I've gotten as high as 23, but that was during the summer when I was doing almost only interstate driving. This is on a stock 2g GSX, 1/3 country, 1/3 interstate/highway, 1/3 city driving.

Ryan

91Bomb · 01-09-2005, 10:59 PM

The EPA lists 90-94 FWD turbo A/T at 19/23.
96-99 fwd turbo a/t 20/27 (don't know why 2g's are rated 4 mpg better on hwy since the gearing and final drive #'s are supposedly the same)

95 fwd turbo a/t = 23/27

All awd turbo a/t #'s are a little lower than fwd
models of the same year.

Driving up I-95 I decided to check my highway mileage. At a stesdy 60 mph I averaged 29.5 mpg in my 91 tsi fwd with only mods being hacked airbox and 2" testpipe.

TURFNNSURF · 01-09-2005, 11:28 PM

91Bomb,

The 2g A/T's get better highway MPG becuse they have a lock up torque converter.

OH yeah, I have doubled my crank HP from stock and thanks to only making that power under boost I still get 21mpg city/highway driving.

91Bomb · 01-10-2005, 01:40 AM

Quote:

Originally Posted by TURFNNSURF

91Bomb,

The 2g A/T's get better highway MPG becuse they have a lock up torque converter.

Thanks, I've wondered about that for a long time

Quote:

Originally Posted by TURFNSURF

OH yeah, I have doubled my crank HP from stock and thanks to only making that power under boost I still get 21mpg city/highway driving.

asexton6969 · 01-11-2005, 09:20 PM

Ive been getting about 22 mpg. That is with getting on it quite a bit and also letting it warm up for long periods of time. While im outside scraping ice off the windshield. Also winter gas always gives u worse gas mileage so..Ill open a post when it warms up and i dont have to let the car warm up all the time.

blitz43 · 01-11-2005, 10:41 PM

having the front o2 gone bad or going bad...could that effect gas milage?

WildJokers · 01-12-2005, 12:39 AM

Quote:

Originally Posted by blitz43

having the front o2 gone bad or going bad...could that effect gas milage?

that can effect your gas mileage some. I have only seen that when they are bad though.

asexton6969 · 01-12-2005, 08:09 AM

Quote:

Originally Posted by blitz43

having the front o2 gone bad or going bad...could that effect gas milage?

Yes if your o2 sensor has gone bad it can diminish your gas mileage quite considerably.

asexton6969 · 01-12-2005, 09:42 PM

For you guys who are saying miles to the tank. Where do u guys fill up at? I have a feeling that my fuel gauge is off. It seems like it takes forever for the first 1/4 and then after that it seems it drains quick!!

Defiant · 01-13-2005, 06:57 AM

Quote:

Originally Posted by asexton6969

For you guys who are saying miles to the tank. Where do u guys fill up at? I have a feeling that my fuel gauge is off. It seems like it takes forever for the first 1/4 and then after that it seems it drains quick!!

DSM gas gauges are notorious for being flakey, although moreso on the AWDs- partly because they pretty much have two tanks where it saddles over the rear driveline and use two senders to guess at what's left. You're best off to learn your range and fill before the last fifty.

DSMeclipse4G63 · 01-13-2005, 10:12 AM

I got 250 to a tank only filling 13.6 gallons is roughly 18 mpg. I do nothing but stop and go and I let me car warm up in the morning and cool off for 30 seconds when I get to my destination. my needle says its below the empty line but no gas light yet, But I do notice from 1/8th tank to empty line the light randomly flashes then fades away. I would say 300 miles or more could be attained if I did a normal driving routine including highway

blitz43 · 01-13-2005, 10:56 AM

Quote:

Originally Posted by Defiant

DSM gas gauges are notorious for being flakey, although moreso on the AWDs- partly because they pretty much have two tanks where it saddles over the rear driveline and use two senders to guess at what's left. You're best off to learn your range and fill before the last fifty.

so where do i get i good fuel guage????

91Bomb · 01-13-2005, 04:19 PM

Is it bad to run out of gas? Is the fuel system sucking in 'bad' stuff from the bottom of fuel tank or is this just a myth?

TURFNNSURF · 01-13-2005, 04:31 PM

Our fuel pumps pull the gas from the bottom of the tank ALL the time. If there is something in the tank that is heavier than gas(water) it will get sucked up by the pump from the bottom of the tank, reguardless of having a full or near empty tank. Not to worry at least about solids(rust particles) getting into the fuel line, becuse the stock fuel pump has a filter bag on the intake and we also have an inline filter in the engine bay. I am however, a firm believer that in cold climates you should keep the tank as full as possible to limit the amount of condensation that can accumulate in the tank. Drygas can be added if you get a bad tank of gas from a filling station, or if the car has been stored or sat for a while.