Alright well ever since day 1 i got my car i've been filling up on chevron/shell because i noticed i got somewhat better gas mileage and the gas is "cleaner"..well thats what rumors say. Anyway i let someone drive my car and they thought it would be nice to fill up my tank, so they fill it up at Arco all the way and i got about 300 miles out of the tank, then i filled up at chevron (full tank) and i drove about 100 miles...well this the problem in 100 miles my tank is half gone, so my car is basically burning excessive gas...and i don't know what could be causing it, i drove in sport mode for about 5 minutes but i highly doubt that will do anything that big...

 

Did you get the coil pack recall done yet? I found that helped my gas mileage a good amount...

 

Yes i did.

 

Fuel Filter Fuel Filter Fuel Filter....... Do not neglect this... Very easy fix to gas milage and prevents the fuel pump from frying.. I just cooked my fuel pump because I had a fuel filter that was 80k miles old.... Once I replaced my fuel filter(and pump )
I went from 24 mpg to 29-30..... No joke...