I don't know what year this window sticker is from, but let's say $3 a gallon for Premium. Edit: My math is probably way off, but I can only find base gas prices in 1985, not premium. Could probably go to $2 and change the mileage average to 7,704 miles, which is even higher.
Estimated Annual Fuel Cost $1285/$3 a gallon = 428 Gallons of gas.
Let's go with the average city miles of 12 * 428 = 5,136 miles a year.
That FEELS excessively high for people who own supercars like that. Doesn't the daily driver only average 20k a year?