Me and a friend.....We measured it 3 times in a Lexus IS300 that is STOCK. Hit .3 on the trip right at the sign that was designated the finish line. The difference between .25 and .3 miles is 264 feet. That means the said "quarter mile" race was actually 1580 feet. A second car measured and the trip turned .3 25 feet after the sign, which is an acceptable margin of error for two different cars.