Hi,Carol. I have found a product that is incredible. It does not just break up the oil so you can wash it off the drive and into the ground. It is called Ecosolve 2000, distributed through Market America, and it is a solution mixed with microbes that eat the oil and convert it to water & carbon dioxide. It can only be obtained through a Market America distributor, which I now happen to be! Mechanics use it to wash the oil off their hands, sells for $17.95 a quart, plus shipping & tax. Read about it at www.marketamericausa.com under Product Info, and then Environmental store. Email me how you feel about it at email@example.com. I'll be happy to ship a bottle directly to your home. You won't even have to shop around!