poor gas mileage

someone help me what do i do to get better gas mileage out of my 2.7 i am probally getting 12 to 14 mpg not good when do i shift because i have no tachometer so i may be shifting to soon or to late ugh

 

seafoam motor, adj. air in tires, change fuel filter,m change plugs and wires........there a few different things that'll help.

 

how can i check if my odo is correct i do know that my speedometer is way off but i drive roughly 15 miles a day 7 days a week and i put 50 bucks in a week thats only 105 miles a week maybe 200 if bored but thast is still very very lowall filters are new i think its my shifting i do nit have a tachoeter so that sucks

 

If you're speedometer is off - then your mileage is off.

To check the mileage - you're best bet is to compare a MILE (on your trip) versus an actual MILE on the road. Highways will often have mile markers - you can compare with those.

Do you have a GPS? You can also compare with that but I'm not sure how accurate they are againest the 'actual highway mile' test.

 

What are you running for tires; an aggressive tread pattern increases rolling resistance and will really decrease fuel economy. Larger diameter tires may effect fuel economy, but will definitely show as an incorrect odometer reading. Lifts create turbulence and decrease fuel economy. Bad O2 sensors will decrease fuel economy and often show as a decrease in fuel economy that came on quickly; check for a CEL. Dirty air cleaner will decrease fuel economy.