Small Engines (Lawn Mowers, etc.): Gasoline /Oil Stains on Concrete Driveway, oil stains, dark oil

Question
Don't know if you're the right person to ask this question, but I hope you can help.  How would I go about removing gasoline and motor oil stains from my concrete driveway?  All stains are now dry. Are there any commercial products on the market that do a faily decent job?  Thank you.

Answer
I have had this problem and tried several different commercial products.  Several remove the stains but they bleach the stained area.  So you have a large light colored spot versus a dark oil stain.

One of the best methods I've seen is a pressure washer and commercial cleaner.  This takes a while and can be expensive if you don't own a pressure washer but the driveway looks great after it's washed.

I hope this helps.
Eric