As tkochh said above, your friend just jumped into a $70K, and now he is worried about the price of gas? Is he a consultant or something - didn't know he was gonna have to commute into the city from NoVA?
In any event, why not just use the SUV as a daily driver then? If he's worried about mileage -- sell the SUV, and use those funds to purchase a beater. When all is said and done, if he turns around and sells the BMW, he's gonna take a bath. A final option -- park and ride or commuter bus
