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doyoshuffle5
01-04-2008, 12:28 PM
alrite guys i kno there isnt to much to improve ur cars gas mileage but any help would be nice i kno by doing the following would help but i kno there is more:

Change air fliter
Change oil
Clean injectors

any more?

cuz i got the car bout a year ago and the mileage jus keeps getn worse n worse

tEh koRnDog
01-04-2008, 12:29 PM
get a new car

luvinthebass
01-04-2008, 12:29 PM
Don't floor it after each stopsign or stop light. go the speed limit. oil change, air filter, tire pressure.

btdickey99
01-04-2008, 12:30 PM
fill your gas tank with water;.....cheaper and you wont spend anymore money on gas for that car

Max4hdmatt
01-04-2008, 12:30 PM
exahust. cold air intake. tornado fuel thing. throttle body spacers will but there about a waste of money in my opinion. basically you want your car to get more air in and get it out as quick as possible.

jco1385
01-04-2008, 12:30 PM
tire pressure, spark plug gap

Max4hdmatt
01-04-2008, 12:30 PM
but all the ones suggested before me are pretty good lol.

jco1385
01-04-2008, 12:31 PM
exahust. cold air intake. tornado fuel thing. throttle body spacers will but there about a waste of money in my opinion. basically you want your car to get more air in and get it out as quick as possible.

that thing is scrap metal. pos worthless investment

stuckinok
01-04-2008, 12:31 PM
check you tire pressure

Keep your car junk free(more weight is bad for MPG)

Cold air intake

High flow exhaust

Max4hdmatt
01-04-2008, 12:32 PM
worked pretty **** good on my truck. i got 3 more mpg's

jdc753
01-04-2008, 12:37 PM
Driving habits can make the biggest improvements in milage, don't follow so closely and honestly find a style where you rarely if ever use your brakes. Think about it after each time you jump on the brakes you jump right back on the throttle, just go easy and relax behind the wheel. Otherwise basic tune up stuff and keeping the vehicle in good condition as stated above, Tire pressure is a biggie, clean oil, proper plug gap, clean air filter. I have never tried it but possible if its gettin worse try some injector cleaner.

What kind of vehicle is it?

shortyg83
01-04-2008, 12:38 PM
that thing is scrap metal. pos worthless investment

have you ever used it to say that? It def helped my brother old jeep out and a couple of my friends had them on old cars claiming about 2-4mpg more depending on there car

doyoshuffle5
01-04-2008, 12:39 PM
99 grand am not the best car but all i could afford

doyoshuffle5
01-04-2008, 12:39 PM
fill your gas tank with water;.....cheaper and you wont spend anymore money on gas for that car

jump of a cliff

jco1385
01-04-2008, 12:40 PM
have you ever used it to say that? It def helped my brother old jeep out and a couple of my friends had them on old cars claiming about 2-4mpg more depending on there car

nope. but if your intake tube is curved, what happens then? it's been widely accepted on a car forum i frequent that this thing is useless

doyoshuffle5
01-04-2008, 12:41 PM
get a new car


not that easy for all of us

Max4hdmatt
01-04-2008, 12:43 PM
but my intake tube isnt curved so therefore it helps me. proven it works.

jco1385
01-04-2008, 12:44 PM
but my intake tube isnt curved so therefore it helps me. proven it works.

if it works for you, super!!

Ferendon
01-04-2008, 10:56 PM
exahust. cold air intake. tornado fuel thing. throttle body spacers will but there about a waste of money in my opinion. basically you want your car to get more air in and get it out as quick as possible.

Throttle body spacers could help in a slight few cases, but not on a Grand Am. An intake manifold spacer would help more so than TB spacers. They work by shifting the torque curve up, thus lowering the RPMs while cruising, in most cases. This is at the expense of low end torque, which will cause a slight decrease in city MPGs. If you're a highway driver, and have the kind of time it would take to install them, go for it. Chances are, they would takes years to pay for themselves, though. Tornados are a waste on any car that has any kind of twist or bend in the IM, because a twist or bend interrupts the 'spiral' of the air flow. On most cars you would need an IM spacer. Pretty much, if you want to modify the airflow, with a positive effect, on a fuel injected car, other than just adding more air, you would have to do so between the IM and cylinder head.

89montero
01-06-2008, 12:58 AM
I'd say your best bet is to make sure all the tires are inflated correctly, maybe a little higher than whats on the door.

Ferendon
01-07-2008, 03:00 AM
Make sure you check the tire pressure on cold tires. Air expands as it heats up, so naturally, there's a raise in tire pressure. If you're supposed to be @ 35 psi, then check it first thing in the morning so the tires are nice and cool, and add from there. On a 215/60/R16 tire, 35 psi at running temp, is like 31 psi cold.