When I moved into my first houseback in the 70's, I dug a hole behind the garage and filled it with oil. I forgot about it for awhile The neighbors daughter saw me leaving one day and told me that when it had rained, the oil was displaced in the hole and flowed downhill. It went straight to her mothers garden. Luckily, her mother didn't hold a grudge. Over time, we all became good friends and I was treated like one of the family.