i just put in a carbonio and it seems that i get worse mpg :/

 

Just filled up earlier this week and I think the odometer read 320+ miles from the last fill up. Normally when I fill up it says 450 miles left but on Thursday when I filled up it said 520 and now it still says 515! It has never said that high before lol...

 

I usually get around 290-300. I don't drive fast, and split between hwy and city.

 

I get on average 31 MPG on the Hwy and around 25 MPG in the city. On a tank I have had 425 miles on 93 octane. I have a 1.8t with an AFE cold air intake. The intake is so damn awesome! Anyways, so yeah thats what I get. Oh yeah, I occasionaly put some CHEVRON with TECHRON Fuel Injection Cleaner or that 104 Octane booster.