- Engine CheckUp is an engine analysis tool that quickly reveals the internal condition of your engine, enabling you to take action to avoid any unnecessary breakdown and expensive repairs. Apply one drop of warm oil to the specially treated analysis pads: • Centre spot shows grime in engine which could block oil ways • 2nd quadrant shows condition of oil to show when the oil needs changing. Also shows if there is water in the oil to advise of leaking gaskets. • Outside ring shows too much fuel being used indicating worn piston rings, poor fuel injection, worn injectors, incorrect mixture. All the above immediately identify problems that would normally require expensive mechanical investigation. 6 treatments. Both diesel & petrol. Supplied with easy to use instructions and service record card.