Model “A” Ford Refilled with STOPNOX at 17 Cents a Gallon – From “The Old Motor”

Interesting article from The Old Motor about the issues with spark knock, pinging and detonation back in the day.

Fuel with tetraethyllead additive names like STOPNOX and other references to either ethyl or  nox in the name was common back in the day.

You can read the full article here