That's screwed up. Sounds like it time to get a new girlfriend as well if her dad is driving it.
Does he not have a car? If he has a car, borrow it and drive the crap out of it, I don't care what type of car it is, go offroading in it and bring it back dirtier then **** and then tell him you just went to the store, must of hit a puddle.
Cobb Access Port
MAPerformance Tune, CAI, and Intercooler
NGK 6510 Sparkplugs
Everything else is for show.