If your girlfriend feels like she doesn't get enough of your time and blames the VX, or your job, or your friends, then she's wrong. That's a priority issue. If your girlfriend isn't a priority for your time, and feels like she needs to be, then the relationship isn't working.
There are plenty of women out there who can deal with a guy who spends all of his spare time on his car. There are plenty of guys out there who can spend all of their waking hours with their woman. There are plenty of both who can compromise and find a middle-ground. The bigger hammer approach doesn't usually work with relationships.
During the day there might be a lot of things I think about or spend more time on than a girlfriend. That doesn't necessarily mean I wouldn't be willing to sacrifice all of those things for her well-being if the situation called for it. Toys, jobs, lifesytles can all be replaced. Until a dire situation demands such a huge sacrifice, these things that I spend time on define who I am. Don't demand I change who I am without a really good reason.
Taking away my car will not free up time for my girlfriend. It will only cause me to find other ways to express myself, which again will probably take about as much time away from my gf as my car did.
Now that was long winded.
-Daver