Bought a 2004 GT2 with 117K miles from a body shop last week and Im noticing that Im only getting about 18 MPG driving 70 MPH on average. A few things worth mentioning, the car was in a collision and i believe the gas cap has been replaced, there are 4 different tires on the car (all with the same wear), It only takes about 8 gallons of gas before the nozle clicks then I have to wait a few seconds to get another gallon or so in, Ive tried oil change, getting the fuel injection cleaned, tires ballanced/rotated/inflated to 33 psi, my battery only reads 200 out of 800 cold crank amps.
Im taking it to a mechanic tomorrow. Which areas do you think I should have him check to narrow the search?