I was wondering if there would be a way to make a simple mechanical device that would test small fuel samples at the track, right then in front of the racer and their peers. No need to be scientific ,not like it has to hold up in court. If every engine is running on the "same' fuel there should be very little difference in each sample. With "spec" engine classes on the rise, cheating up the fuel weather it be Alky or Gas is the most obvious way to gain an advantage, at a very dangerous expense to the driver and safety crew. Thanks for your input.