Longest running sponsor I can think of locally is the Crume-Evans backing of Monte Edison's car. Schatz has had Parker Stores for quite awhile on the outlaw circuit.

Guess I am just wondering what it takes to keep these companies in the game. Maybe if we as fans would mention that we saw the name on the race car when doing business with a sponsor it would help.

That and always try to do business with companies that back a race car when there is a choice.