Basically yes. You can't usefully put a car into one of "crashes" or "doesn't crash" categories the way you can with e.g. what colour an M&M is, or whether Drug X did or didn't lower blood pressure in a patient, so miles travelled is a reasonable metric.
It's possible you might be getting hung up on notions of sample size having to be above a particular fixed number and therefore miles sounding like a cheat, but actually there never has been a universal "correct" minimum sample size; it all depends on the data. A billion of one thing might not be enough, but 4 of another might be plenty.
Post is in the correct sub and yet everyone in the comments is taking it entirely at face value. Are you all new, or are you just playing along?