Description
Full color 9 1/2″ x 12″ ad that calls attention to Keotane which they have developed and added to every gallon of gasoline sold at their stations. The ad has a picture of two pistons, one with the combustion surface worn but clean and the other with the combustion surface covered with carbon which has flaked off in areas and left an irregular surface. The captions explain that “As you drive all gasolines add mileage stealing carbon to your engine” and “Only Skelly has Keotane that ‘unglues’ carbon”. The ad makes the promise that “a Keotane-Clean engine can give you one mile extra for every 8 you drive”. The text, full of facts, indicate that Skelly has been granted a patent for Keotane, that road tests prove that using it will give you an average of 12.7 % more mileage and estimates are that it will “add up to 6.1 cents extra value per gallon”.
Source: May 3, 1963 Life magazine.
