Gas Mileage

[Dalton C]

So i got this kia rio and it should be getting 25 mpg, 275 a tank, and im getting more like 14-19 mpg. I dont get it, Its only got 50,000 on it, anyone know what may cause this? I drive like im 90 years old so that cant be the problem

[Tachyon]

If the MPG is that bad, my first though would be faulty front o2 sensor.

[Trogdor]

If the MPG is that bad, my first though would be faulty front o2 sensor.

Its a pretty common problem with kias

[Dalton C]

Well thats easy to get at, what should i look for to know if its bad

[Dalton C]

Heard it could be breaks too, it is a little jumpy from start and shifts funny sometimes

[A//// Guy]

Do a scan and see if any codes come up. Check engine light? O2 is the first bet.

Brakes you mean? A stuck caliper would slow you down.. but youd notice the sound and a really hot wheel, as well as your brakes probably ground down to the metal on the pad..

[Kracka]

Heard it could be breaks too, it is a little jumpy from start and shifts funny sometimes
Do a A/T fluid flush and replace the filter...along with a new front o2 sensor. Take care of all the other regular tune-up and maintenance items too.

[Dalton C]

Got the car lifted up no stuck brakes, air filters good, no check engine light, I'm baffled.

[Tachyon]

What are the AFR's at cruise (NB voltage)? Does the car feel sluggish at WOT?

I had a Kia once that the catalytic converter got clogged and mileage tanked. The only tell tale problem I could find was reduced performance at higher RPM and load.

[Dalton C]

It is slow as hell but I always just figured it was the car. I have a obd scanner comin in the mail so i can get some readings soon