[Kihashi]

I'd use "vehicle" to be more general than "car". If I just bought one, I'd know whether I bought car, truck, SUV(ehicle), etc. Although, in some cases, you might say "car" generically if the distinction doesn't matter. Also, "vehicle" sounds a bit more formal, so if I were giving, say, a deposition, I might say that. I can't say that I think people around here overuse the term.

(Midwest USA)