The car weighs 3280 without me and quarter tank of gas. I weigh about 140 (depending on how much track food is making its way into my diet).
The spare is a steel wheel and trailer tire so I'm going to call it 50 lbs. I was also running about 1/2 tank of fuel. It wouldn't surprise me if it had been pulling down close to 3500 lbs with me in it.