SouthPole1989

ok i have been checking my mpg every tank and the average seems to be 21 with a/c off and 20 with a/c on. now what would cause that even if i drive like a old man going 5 mph slower then the stated mph and not take off from red lights i still only get 24. my air filter is new my tire pressure is 33 front and 30 in the back and i just rotated my tire like a month ago and did not help my alimeant is perfect i can go over a mile with not touching the steering while depending on the road. and it has a stock exhoust and stock intake box.

ands that with a 96 sl2 mp7 tranny thats also all city milage

Satyllac

Bump your tire pressures up. Check your engine's compression.

So far I've been averaging 31.5 MPG with my '01 SC2, and I drive it hard. The lowest I've got was 25.5, and that was almost all 1/4 runs at the track. The best was 38.7, almost all highway. All I have is intake bolt-ons (CAI and throttle body), factory wheels and tires, factory MP3 transmission, and 80K miles to date.

__________________
*Note To Self*
Spend less on car, more on guns.
*/Note*
-Randy

rycera

Describe your typical city driving... is it traffic lights every block with lots of waiting at red lights/in traffic? If so maybe 20~ is about right. Can you run a tank at highway speeds and test the highway gas mileage?

Have you checked for engine codes? A malfunctioning sensor keeping the fuel system in open loop would be my first guess. Might even be worthwhile to check the wiring over once, clean the battery posts, clean the ground wire from the under-hood fuse panel (that one's corroded and caused problems with 2 of my s-series)

FWIW, I get 32~mpg in mixed driving in my 01 SC2 5spd, my wife gets 28 city in her 01 SC2 auto.

-Ryan

SouthPole1989

typical driving is obeying the limits maybe like 5 over the speed limits maybe some jack rabbit off the lights. lights are about couple of miles a part unless there is like 2 between work. ( i work 6 miles away) also though i am less then a foot above sea level if that matters. last time i went on the highway i belive i got 26 with ac on

PurdueGuy

it sounds like something's not quite right. What tune-up stuff have you done in recent history?

vms150

dont complain, my 4.0 cherokee get 12mpg (1/2 city 1/2 high way) on a daily basis. it takes around 55 bucks to fill and driving to school and back everyday i have to fill it once every 4 days.

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Brady
'93 SC2 (hydrolocked)
'93 Cherokee (lifted)

x saturn x3

I've been getting around 23mpg with my 1995 SL2. mp7 tranny as well. The car has "learned" how i drive, and i go to school, work, walmart, everywhere. Its like.... 60% city, 40% highway. The highway part does have a lot of traffic lights though.

SouthPole1989

tune up stuff hmmm..

every fluid has been changed. basically it. i am about to do a spark plug and wire replacement soon.

PurdueGuy

probably a good place to start. Might look at an air filter as well. Could be signs of a bad ects, too.

SouthPole1989

i just replaced the air filter like 2 k miles ago on the oil i have in now. maybe ects you got a diys on it right.