SOHIO Supreme Gasoline (Fri. 5/27/49 ad in The Blade)
...More Power! Peak Performance!
Sohio Supreme Peak Performance Gasoline (Wed. 8/3/49 ad in The Blade)
Improved X-70, Ohio's Favorite for Long Mileage.
What's a gallon of Gasoline worth?...Sohio (Tuesday, 8/30/49 half-page ad on page 4 of The Blade
...If it's Sohio X-70, the price is 19c plus 5-1/2c in State and Federal taxes...