Since a lot of product review websites actively filter out reliable and useful content, here's a comment that I left for a review on a product called Oil Gone Easy at
I have to disagree with the result of using the product as reviewed on this site. In my particular case, Oil Gone Easy stained my concrete wherever the product was applied, so now instead of having a stain, I have an oil stain covered by another noticeable stain.
Also, Oil Gone Easy appears to seal the concrete wherever you pour it, so if you plan to apply an epoxy coating to your garage floor you now need to etch it so that the epoxy still stick. I'd advise people to stay away from this product until additional evidence surfaces that can support the claims of the manufacturer.