by Chinky420 » Mon Nov 10, 2008 8:57 pm
i'm pulling 15 mpg city with cel and 20 highway with cel. 1999 sle v6 auto, 135k miles on ticker, cel p0135 (oxygen sensor bank1sensor1)....oh yeah, and i have a lead foot.
things to consider for better gas milage
1- make sure tires are inflated properly
2- filters: oil, air, and possibly fuel: check em and make sure they're clean/new
3- fluids: oil, transmission/gear, coolant
4- spark plugs, and plug wires. 130k miles is a lot if it's been using the same plugs/wires the entire time.
5- cruise control kills mpg, the computer cannot see a hill until after it hits it...if you speed up a bit for a upcoming hill, you may be able to roll through the portion where you lose your speed, and back to cruising pace at the bottom of the hill, this keeps the RPMs minimized, without compromising too much momentum/speed.
6- clean the throttle body, this can be done with some cheap aerosol cleaner from autozone
7- dead weight in the trunk, lose it
8- windows up for aerodynamics
9- get a granny start from each stop. if you keep the rpm's under 3k in first, and under 2500 rpms in subsequent gears, you will maximize your engine's efficiency, and reduce gas use.
10- ground wire upgrades will help with maybe 1-2 mpg, or maybe i changed my driving styles slightly after i installed these (HA!) either way, i'm trying to say that "i personally noticed a difference when i installed, but you may not"
there are also other new technologies that i know absolutely nothing about, like running the car on water, or ethanol, but those are costly and you should be mechanically inclined before trying these on your own (read: lots of research and professional advice needed)
but the first place you want to start is gonna be just doing a full tuneup. fluids, filters, plugs/wires.
oh yeah, and check your timing belt while you're at it.