Really Bad Gas Mileage: O2 Sensor?

[NViejeP]

Well its not that big of a difference. ARound 90% of one mile if I calculated correctly which raises my MPG to a ver minimal amount.

So that can't be it. I'm really stumped, does nayone else who drives almost 100% city want to fill me in if this happens to them too?

 

[chip4]

So does that mean you have a 10% loss every mile? I dont know how you can do it incorrectly as the calculator should "lower" your MPG

-If you still doubt it you really need to put back the old tires and find out for yourself, also remember those bigger wheels will weigh more, have more rotating mass, and wind drag.

 

[NViejeP]

Ya well, I bought it used and it came with these tires. I mean there is a difference but it is reasonably minimal and it may raise my MPG by like 1-2 but its still going to be very low. So thats why I think there's another factor, unless of course 12-13 mpg city is normal.

 

[chip4]

I give up

-I already told you cant calculate it the same way, go replace your O2 sensor if you like or even better why dont you remove all that stereo equipment.

 

[r_mutt]

this may be an seem obvious, but why not take a long drive on the highway where it might not be so hilly- run the tank near empty from a full fuel fill up and then calculate the milage. if you get a number much higher than your usual 10- like 18 or so, then you know that it's the steep inclines that are throwing your milage off.

 

[NViejeP]

Ya, well I was planning to do that on my trip to Los Angeles in a week. I was just seeing if anyone knew a positive answer so I could get it fixed this weekend if I needed it.

I guess I will know for sure if the hills nad stuff play a factor.