It can be difficult to fit a funnel into the filler hole of some vehicles. The company 9-Circle has developed a oil filler funnel similar to the ones designed by Assenmacher Specialty Tools (AST). The 9CL version (9CL-6127081) has been improved with a clear neck so technicians can see the oil pour into the engine.
The standard 9CL version of the funnel was designed for Toyotas, but the quarter turn adapter the funnel can be used for many other cars including: BMW, Lexus, Audi, Mercedes-Benz, Porsche, Plymouth, Volkswagen, and Volvo.
Here is the link to the 9Cl-6127081
