The OFAUD1000 is an oil funnel specifically designed to attach to the valve covers on VW/Audi, BMW, Dodge Sprinter 2.7L, Mercedes and Volvo 2.5L engines. When you're adding oil to the engine you don't have to worry about making a big mess due to the internal baffle of the valve cover. Also fits Teledyne Motors 550 and 520 found in Beechcraft and Sessna aircraft.