Dealer said they found nothing wrong. Surprise suprise. Anyway, I replaced the filters when I got home. I plan on seafoaming or Lucas cleanign my tank on my next fillup.

And less oxygenated gas will be used in April and it will be warmer and and and...hopefully I'll get normal mileage lol. If not I don't know what to do.

 

What tires do you have? What the tire pressure set too. What grade gas are you using? How many miles are you getting out of full tank?

 

I have BF Goodrich tires (not sure which kind off-hand, but can check later if important). I set my tire pressure to 33-34 PSI (this is correct, right?), and as for how many miles I am getting out of a full tank...it depends on whether I drive in the city or on the highway. I never ran the tank completely dry so it's hard to say--I usually fill up soon after the alert comes on my display. But if my highway driving is 20-21 mpg, that would be about 400 miles to the tank. But my city driving being around 9mpg, that would be 180 miles, assuming I have a 20 gal tank.

 

Pressure is good. However little more helps on mpg. I keep mine around 35. Are those city driving are sort? How long you warm your car up. Here is my take. I drive around 6 miles to and from work. If I warm up the car just a minute or 2 longer I can see the mpg drop. I really don't care about it but it might help you.

 

I usually warm it about a min. You're saying warming it up longer helps mileage?

I think ti says inside the door to keep the pressure at 33, which is why I don't go higher.

 

You have done everything you can and more than you sould have to. If you are still getting 9-10mpg city driving then something is wrong with the car, the gas, the way you drive (or where) or your calculations.
My city driving for the last work week (Mon-Fri) was a calculated 17.8 mpg.
I just did 225 miles of hwy driving today (hwy401) and used 8.8 US Gal. I averaged 68mph (according to inst.panel LCD). I got 25.6mpg according to how much fuel it took to refill the tank tonight (8.8).
TG - what mileage do you get? Use this to convert if it helps. I've been converting everything to US numbers.

 

No longer you warm it up the mpg goes down. Simly you are burning gas without puting any mpg in the car.

RPM

I am getting around 18-20 with light city driving and gentle. However it could go down to 16 if I have a little heavier foot. The six miles include only 6-7 lights and a 2 minute warm up.

Last summer I had a Northern NS trip and on hwy my best was 25-26 mpg. However I had 23 also. I don't really drive the same.