hey guys, I took the tires back, they rechecked the balance and it was of 50 on one side and 25 on the other, took it for a test ride on the highway and its all good, can you believe that, they cant even balance a tire, anyways about the gas millage, I had a check engine light come on and it shows 56 in continuous memory meaning mass air flow circuit so now I have to look into that so it must have caused the increase in gas guzzling, lol, thanks guys.