Gas mileage

[doyoshuffle5 10+ year member]

get a new car

not that easy for all of us

 

[Max4hdmatt 10+ year member]

but my intake tube isnt curved so therefore it helps me. proven it works.

 

[jco1385 5,000+ posts]

but my intake tube isnt curved so therefore it helps me. proven it works.

if it works for you, super!!

 

[Ferendon 10+ year member]

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 10+ year member]

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 10+ year member]

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.