improving gas mileage

[grimmstyle]

Im questioning the best way to improve gas mileage upgrades.

wheel size, engine parts, transmission, areodynamics,

I have a 1999 grand am gt 3400 HO v6.

help me out thanks

[gicts]

an exhaust and intake are a good start. Check out the search function for more ;)

[tenspeed]

Fresh plugs, hard tires and a soft foot.

[matts]

i'll agree with the plugs and light foot, but i think jacking the tire pressure up is pointless. yes, the tire will roll easier because of the extra air........which will save gas. but with more air in the tire the car is going to ride rougher for one, and secondly the tire is going to wear out alot faster. the extra air will make the center of the tire "crown". which will make the middle of the tire wear out probably 5 times faster than the edge.

i just think it's a tradeoff that isn't really worth it. you're saving gas, but you're wearing out your tires faster.

and dont forget about the air filter. :)

[gicts]

amazing gas saver (http://cgi.ebay.com/ebaymotors/Master-fuel-economy-Magnetic-gas-saver-add-2-Tornado_W0QQcmdZViewItemQQcategoryZ42604QQitemZ804 2081134QQrdZ1) recommends adding a tornado as well :)

[matts]

:lol: i'd rather inflate the air pressure in my tires than use that waste of money

[gicts]

Originally posted by matts
:lol: i'd rather inflate the air pressure in my tires than use that waste of money :lol::agree:

[99blackSE]

Header back exhaust, CAI, bigger/lighter wheels, UD pulley.

Im not sure how much lowering the car would improve its cutting power.

[voyager]

bigger wheels = worse mileage. stock size rims at least 6-7lbs less than OEM would be ideal.

good exhaust work will help highway mileage noticeably but you may suffer in the city.

you can get better mileage with a 5spd. it's lighter and you are able to coast more efficiently.

weight reduction.

[slowbird]

-Keep the windows up

-Don't use your AC

-Take the highway whenever you can

-Make your friends walk (unless they give you gas money)


I also agree with the Fresh plugs, light foot, and the Exhaust and pulley recommendations.

[99blackSE]

Originally posted by voyager
bigger wheels = worse mileage. stock size rims at least 6-7lbs less than OEM would be ideal.

What about a 17" rim that wieghs 6-7 lbs less than a stock 16"?
I mean its less weight overall and its using less rotations no?

[matts]

bigger wheels usually give you worse mileage across the board

[tenspeed]

Originally posted by 99blackSE
it's using less rotations no?

No. Not if it is sized correctly.