Many years ago the Standard Oil Company changed its name from ESSO to EXXON. Young people who watch American Pickers will know this. If you're old enough you'll actually remember the public campaign.  For months, the famous "put a tiger in your tank" tiger was pictured on a large sign climbing a stepladder to the top of the local gas station's ESSO sign. With a big smile on his face, the tiger held in his arms the n…