I was playing with a couple of toruses and a hexagonal prism, and made something that looked like an axle. So I went ahead and finished it off with a vehicle! I think it looks more truck-y than car-y, but it’s open to interpretation…
This printed fine on the Ultimaker, but I did have to enable support, which makes the under-surface somewhat rough. I also needed a decent size brim because the wheel contact points were not sufficient alone to keep the model stuck to the bed while printing.
Made in Morphi 