Ok, lately ive been getting absolutely terrible gas mileage! it shows i get 18 miles per gallon!! i think it started happening after i put my new rims and tires on. i recently put 17s on with bfg kdw tires. also my light for the tire pressure sensor is on. could that be the problem?

low tire pressure = sucky mileage

do more preventative maintenance

winter gas mix

did you put the sensors back in the wheels? thats would cause the light to come on.

i think the sensors are in there but their not synced... ill try adding some pressure today, see if that helps at all

The winter mix gas will net in a 10% or so loss in milage. Keep your tire pressures up, and all the normal jazz

whats the winter gas mix?

For winter the oil companies make a different mix when they produce the Gasoline. if you really want to know read this

http://epa.gov/otaq/regs/fuels/ostp-3.pdf

Are you using your defrost more now than you were prior by chance?

nah, its been happening since about september.. im guessing its my intake or rims causing the problem..

anything on intake guys? throwin off my maf?

Hmm well I thought the mileage difference was due to things like warm up taking longer (richer fuel mixture for longer), and the atmosphere is more dense. More o2=more gas for stoich.

Oh well i could be wrong.