One of the projects I have planned for this spring is to clean my garage
floor. It's in great condition, but it has a few oil stains and dirty spots
I would like to clean up.

The floor is only a few years old, and has a very nice troweled surface.
So, I don't want to use anything that will etch or damage the concrete. I
just want to clean up the stains and dirt.

Any recommendations other than the basic soap and water?

Thanks,

Anthony