Auto 1.8l 17-35mpg?

[malloc]

So I live in the Central NY area around Ithaca/Syracuse and have only have my 2012 Sonic Hatchback(1.8L auto) for a few weeks. I've taken it on a 5 hour drive to/from NYC and averaged 34MPG on the highway, and a short trip to and from Syracuse where I averaged the same on back roads and mostly highway. It seems like when I'm in the city though(Ithaca), my average MPG will go to 16-18MPG between fill ups. I'm in a hilly area that has an annoying amount of stop signs and I also have some cheap Goodyear Nordic winter tires on, but can that really cause my MPG to drop so low?

Is it normal for Sonics to only get between 16-18MPG in the city with snow tires?

I also noticed sometimes that my Sonic looks like it "forgets" to switch gears. Sometimes going up a hill if I hold my foot on the pedal it may get to and stay at 3-4K RPM until I ease my foot slightly off the gas, and then it shifts up. If anything I feel as though that may be the issue with my MPG, but I've seen a couple posters here talk about that like it's normal for this car.

 

[mitdr774]

Lots of hills and stop and go will result in poor economy. The trans is probably holding gear due to throttle input and load. Snow tires will have have some effect on economy, but it seems to only be a few MPG for me.

 

[SonicBoy24]

Hills and city driving will kill your economy.

But I would make sure your tires are properly inflated, that can make a huge difference.
I have hankook ipykes and I think I'm running 34psi at all 4 corners

I have had my 2012 1.8 auto ( ) for over 3 years now. In the summer I get about 33mpg if I keep my foot out of it, I think the lowest winter tank I have had was 28mpg.
I just filled up with Premium Non-Ethanol this afternoon at $3.15 a gallon so I can't wait to see my mileage with that, the first Non-Ethanol tank I have had