See also:

Fuel octane rating
This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI). Using a gasoline with a lower octane rating can cause p ...

Other markings
The following makings are also placed on the sidewall. ...

If steam is coming from the engine compartment
Turn off the engine and get everyone away from the vehicle until it cools down. ...