$2.15/gallon? 2.50? 2.65? try 2.79...that's what it was a couple weeks ago here on the mid/lower san fran peninsula. Premium actualy hit the $3 mark. Anyway my vote is the lift, tires, and speedo. I have 32's and when I go by those radar things the police leave on the road that show your speed I notice that my speedo is off by about 12mph in a 35mph zone. If you still think it's something else, then you might as well poke around under the hood checking for mechanical/electric problems like the ignition, loose bolts on the intake/exhaust, etc.
