[there] are those who say the very last car on the planet will be a Beetle, no matter how many decades or even centuries away that may be.
— Volkswagen Beetle by Richard Copping

Oldsmobile stood out too much.

As opposed to the actual time traveling car, the Delorian, which looked out of place even when new.

Are you suggesting VW beetles are migratory?

A VW Beetle, at this time of year, located entirely in your kitchen?

Yes

May I see it?

No

was about to suggest that a truly era agnostic vehicle themed time machine disguise would need to be a wooden river raft or something, but then remembered that the universe has spent far more time than not consisting of subatomic particles that are too hot to form atoms yet, and that's just not a very aesthetically pleasing vehicle shape