This ad appeared in the Daily Oklahoman in 1940:

HELLO NEIGHBOR WE’RE PROUD TO BRING YOU THE NEW, HIGHER ANTI-KNOCK ANDERSON-PRICHARD CHALLENGE GASOLINE

Over in the big Anderson-Prichard at Cyril they’ve been doing things for you–and your car. Today you have the result of months of painstaking refining work–a new and vastly improved CHALLENGE gasoline.

Now, when you really “step on the gas,” if it’s CHALLENGE gas you won’t notice the slightest knock or “ping.” But as the miles fly by, you will notice how much longer your gas holds out. There’s a lot more power and quicker acceleration in this new CHALLENGE gasoline. And you get minimum dilution in crank case oil.

As your neighborhood independent jobbers, we urge you to try this gasoline. Its high anti-knock value is assured you by the severest test method in the oil industry. It’s the finest gasoline Anderson-Prichard ever produced to sell at regular prices!”

AIDS OKLAHOMANS!

As an Oklahoma owned and operated oil company, Anderson-Prichard keeps Oklahoma money at home–keeps hundreds of employees at work, helps local business through the purchase of supplies and equipment; and indirectly aids you through tax payments amounting to several hundred thousand dollars a year. The Anderson-Prichard slogan “Hello Neighbor” means more than just a friendly greeting.