Thread: Better Gas Mileage?

Ok so anyone have any tips? Im not a heavy footer but i feel like im consuming a lot of gas then i should be. No gas leak at all by the way.

I know a dirty fuel filter can affect fuel economy a little bit right? When should i change that? Fuel injection cleaner? Anything about that?

Thanks a lot to those for helping me as i post CONSTANTLY asking the random silly questions.

Clean MAF and TB.

Originally Posted by E IN v Y

Clean MAF and TB.

TB?

^ Throttle body

Should i use some fuel injection cleaner also?

Fuel injector fluid wont hurt anything.

Originally Posted by matt5112

and most of it wont do anything.

Use seafoam or STP complete system cleaner or best of all: GM fuel system cleaner.

If you don't want to pay 20 some bucsk for GM fuel system cleaner Techron Fuel System Cleaner made by Chevron has almost the exact same chemicals in it. Its like 12 bucks

Originally Posted by scottydoggs

i thought i just cleared this up.

every car has a reserve of 100 miles in the tank when the light comes on, thus leaving at least 3 to 4 gallons in the tank when the light comes on. 4 + 13 = 17 last time i checked. we all have a 17 gallon tank. plus the fuel lines and filler neck.

Well then i guess i should stop freaking out in a middle of a drive when my low fuel light comes on. I know the most ive ran before putting gas in was about 317. I always assumed it was 13.5 gallons because of filling up after 317 miles and it would stop around 13 gallons. I usually avoid the low fuel light and under the quarter of a tank line is when i put a little bit back in to over at least half a tank.

Originally Posted by indygrandprix

If you don't want to pay 20 some bucsk for GM fuel system cleaner Techron Fuel System Cleaner made by Chevron has almost the exact same chemicals in it. Its like 12 bucks

I did get some Pro-Gard fuel injector cleaner with techron additive for about $5

For your 98 I'd suggest removing the Throttle Body from the Upper Intake Manifold then remove the Mass Air Flow Meter. You'll have to go get the special torx bit(s) with the hole in the middle at the parts store and pick up a throttle body gasket. Remove the Mass Air Flow from the Throttle Body and clean them separate. Use Mass Air Flow cleaner on the MAF and Throttle Body cleaner on the Throttle Body. It's easier to get to everything good and you'll find a lot of carbon build up on the inside of the TB. Put everything back together carefully and taadaa.

What's the average mileage one can go on a full tank of gas?

Originally Posted by dbextreme

For your 98 I'd suggest removing the Throttle Body from the Upper Intake Manifold then remove the Mass Air Flow Meter. You'll have to go get the special torx bit(s) with the hole in the middle at the parts store and pick up a throttle body gasket. Remove the Mass Air Flow from the Throttle Body and clean them separate. Use Mass Air Flow cleaner on the MAF and Throttle Body cleaner on the Throttle Body. It's easier to get to everything good and you'll find a lot of carbon build up on the inside of the TB. Put everything back together carefully and taadaa.

What's the average mileage one can go on a full tank of gas?

Also should be noted to NOT touch the MAF wires inside with anything, just spray it down thoroughly with some pressure and let it air dry. Touching will result in you going back to the store to buy a new sensor.

About 310, ive ran up to 317 before but as im thinking about it, as gas prices are crazy right now, usually put 6 gallons in but wow its gone within 150 miles it seems, i just think that needle is goin down quite fast...

Originally Posted by Adidasdude1989

About 310, ive ran up to 317 before but as im thinking about it, as gas prices are crazy right now, usually put 6 gallons in but wow its gone within 150 miles it seems, i just think that needle is goin down quite fast...

My 04 GTP makes about 330-350 miles on a tank, and I live in the mountains... lots of interstate though too. My DIC says average is 21.2mpg. Im hoping it'll go up now that I fixed my MAF issue.

HOLY CRAP!!! Then I got a problem to!!! LMAO

My car runs fine, no problems, no SES light, and plenty of power. No matter how I drive I can only average 250 miles per tank......

I have new LIM gaskets, UIM, Removed the throttle body and cleaned it and the MAF, new fuel filter, new plugs and wires, new downpipe, Ubend and Res delete... I do have a heavy foot, but nothing like WOT all the time... I was getting the same mileage before my engine fire to...

Now I'm concerned.... LOL

Originally Posted by 99PontiacGTP

how big is your tank? mine is around 13 gallons and i get around 275 miles which is around 21 mpg. I drive city/highway combination.

thats better than mine...i go from empty to full and its only 11 gal max...and i only get about 180 miles...roughly 17 mpg max...so that blows. i did plugs, o2 sensor, oil change recently...not sure what the heck is the deal...and not sure why i can only put 11 gal in from full empty, that or my tank sensor is WAY off