14 to 16 mpg

ok...so when i got my car the dealership put 87 gas in the engine...i flipped out because i only got like 8 mpg...now i have put 2 tankfuls of premium 91 and now i only get like 14 to 16 mpg...this is a combo like 1/2 and 1/2 city/freeway driving...the majority of the time i drive normal... and occasionally my heavy foot takes place...but its like 80% normal driving and 20% heavy foot but i still get crappy mpg...and the dealer said if the check engine light isnt on there isnt anything they will do about it...the only option they gave me was to bring the car back and let me pick out another one but i dont want to because i love my eclipse and yeah...

does anyone have any suggestions or know maybe what is causing this?

a little bit of heavy foot driving can have a major effect on fuel economy. You'll have to do a long stretch of highway driving using Cruise Control to know for sure if there's a problem.

yeah heavy foot driving can kill your gas mileage. if i drive around town, the i get about 11 mpg, but on the interstate i get close to 25 mpg

Man I'm always racing up and down, and I consistantly am getting 20+ MPG... I have the 4 banger too.

Man I'm always racing up and down, and I consistantly am getting 20+ MPG... I have the 4 banger too.

Well that makes sense...2 less cylinders to pump fuel to will obviously make better MPG. I have a GT 5 speed and get about 20 in the city with pretty aggressive driving, and over 30 Highway. Maybe you should check your air filter...if its real dirty thats probably why. Also if you have a heavy sound system the extra weight might play into it, or if you run your AC alot.

also, flooring it in an auto and flooring it in a manual is two different things. with the manual, the gas seems to go away very fast

God bless my auto... Better gas milage, and when the turbo comes no lag between gears! I dont care what anyone says, I love my auto! (And if you think I say this just because you think I cant drive a stick come see my rock crawling Jeep, and my Rally RX-7)

yea autos is good for a car you mostly use to drive daily like to work and trips ... hell I even like them that way but im manual all the way no matter what lol all about what you like ..... and 8mpg you sound like me and my heavy foot also lol

ok..my spyder is a auto...it is also a gt so it has 6 cyl...and yeah...i must admit...8mpg at first that was with mostly a heavy foot..but i had just got my car so i had to test it out...but yeah i like my auto too...and i also know how to drive stick...and yeah...i like both...thanks for the help.

what the hell are doing. 8 miles to the gallon you might as well be driving a viper even they get 10 to the gallon and they have 4 cyclinders more than you

somebody might be running rich

I know my car was running rich when I first got it. The MAP sensor was broken. It made my chrome tip black evertime I started it up. I was getting like 7 mpg.

he might be running rich. but that would probably throw a SES code. and he said theres no SES light. just a thought, take you gauge cluster off and make sure there is a light for the SES. i remember one of my friends got tired of his SES light coming on, so he just took the light out. i did the same thing with my seatbelt light

somebody might be running rich

Running rich. They should be shooting fire out the exhaust.