Carport stain remover.

[up2you2]

Could I please ask for effective solutions to remove what looks like oil stains on my sand wash, that my car was sitting on?

I have used liquid soap washer deterrent with a light scrubbing brush already, as you can see to little or no effect.
A Thai product that hopefully will not discolour or bleach the sand wash to yet another colour.
 

[transam]

I cannot answer your question but I have never seen oil stains in cement removed to perfection. Usually one paint's the floor with a special floor paint specifically designed for cement sealing in a garage..

[fredob43]

You could try Vixol (All Supermarkets sell it) that might get the stains out, but I would try it on a small bit first just in case it discolours.