Girls are more receptive to financial reasoning--the cost of running out can include having to replace a damaged fuel pump. Maybe you should give them the mission of visiting the local Volvo repair guy and pricing out the cost of that job-it may make a greater impression than Dad's carping. Our daughter turned out to be very car savvy--started with a '67 Barracuda in '94 and has progressed through (2)140's, (1)240 Turbo, (4)Saab 900's (early and late, turbo and non), (1) Jeep Grand Cherokee and now an XC70. I think the best thing she ever did (car related) was spend a summer assisting me in doing a major brake overhaul on the Barracuda--dirt, rust and all-gave her the perspective of the work involved in keeping a car on the road. -- Dave