This video is one of the craziest things seen. Shell, the petroleum company, created a transparent Nissan 370Z to show how its Shell Helix oil works to keep a car's engine clean.
The first 30 seconds of this video is the actual commercial. Then Leila Prati, Shell Helix global brand manager, explains how the transparent car came about. The fabricators that built the car also created a double-the-normal-size, transparent, standalone engine so you can see in detail how the oil works.