Years ago I used the old standby newspapers to catch fluid and oil spills happening when working on any of my vehicles. Several years ago I started using pet training catch pads or Piddle Pads. Highly absorbent on one side, the reverse side is an impermeable sheet of plastic. Keeps oil, etc from running off and making big messes on the garage floor. Cheap, and available in discount stores, etc. Hope this saves someone stained concrete and messy cleanup.