I have not noticed any effect on gas millage. It may have gotten a bit worse but not that I have been able to see.
I just took a trip to zions from saltlake and my mileage was around 20 to 21 per gallon but that was because I had a large amount of gear on top of the roof rack.
I should have everything done by tomorrow evening so I'll take some good shots for everybody. These tires have the three peak snowflake rating which means they should do great in the snow.
Upgrading the stock tires to some All Terrain Pirellis.
Mounting them tomorrow so I will update on drive quality after. Paid 550$ for all four from Walmart, mounting will be an additional 50$