Originally Posted by mrarroyo

Something else to remember is to at least allow 2,000 to 3,000 miles to allow all the parts to break in and seat before calculating the MPG. I change my oil and filter w/ Mobil 1 5W30 at 1,000 miles in all my cars to remove any flakes/dust/etc that comes off in the beginning of the break-in process. I then change the oil/filter at 5,000 miles and every 5,000 miles thereafter also with Mobil 1 5W30.