studded tires: 40.03 m.p.g. ...

[gid]

got four COOPER Weather-Master ST-2 studded snow tires put on the '08 automatic sedan and we took it for spin . Got 40.03 miles per gallon on refill of 87 SUNOCO ( 10% ethanol ) . The trip was very wet roads ( pouring rain on interstate ) at average speed of around 54 m.p.h. ( 70 on occasion ) and winds gusting high as 35 . Tires set at 35 p.s.i. , 2 people , A.C. on about 40% to keep windows from fogging , and average temp of 52 . Been using PENNZOIL Platinum 5w-20 synthetic motor oil for little less than 2,000 miles . If driving conditions were better , probably could have reached 42 m.p.g.. Quite impressive with 4 studded snows , doesn't get much more gas mileage with the BRIDGESTONE all seasons . Makes me wonder if they have more rolling resistence . May try to pawn them off and get better tires .