I have a small air compressor that I'm adding wheels and a handle to for
easier mobility. If I make the handle as long as I'd like it to be, it
won't fit upright in my car. It is an oil-type compressor. Can I turn
it on its side in the car?

I think I can, but I know you can't do it with gas engines and although
I know that they're different, I want to make sure that I'm not missing
anything.

Thanks,
Bob
Bob,
I think I would just make the handle out of a piece of 1/2" pipe, "T"
in shape with the bottom of the "T" capable of slipping into another
piece of larger pipe with a thumbscrew to lock it into place. Loosen
thumbscrew, slip out the handle, load the compressor....
HTH.
Ken.