Like it or not, I think the days of 87 and 85 octane gasoline are going to be a thing of the past. Exactly when, who knows? For the gasoline engine to live on, it needs to happen.
The upcoming engines used to achieve the EPA 54.5 MPG mandate by 2025 won't allow new gasoline vehicles to run on 87 octane. There are two work arounds I thought up to keep 87 and 85 octane available:
Nozzle size and dyed gas. Dye the lower octanes and install a device in the newer vehicles that can see detect the dyed low octane fuels. Use a smaller nozzle for the new high octane gasoline. The DEF nozzle size as an example.
Skip to 5:19 and listen to what this GM VP of propulsion systems has to say.
The upcoming engines used to achieve the EPA 54.5 MPG mandate by 2025 won't allow new gasoline vehicles to run on 87 octane. There are two work arounds I thought up to keep 87 and 85 octane available:
Nozzle size and dyed gas. Dye the lower octanes and install a device in the newer vehicles that can see detect the dyed low octane fuels. Use a smaller nozzle for the new high octane gasoline. The DEF nozzle size as an example.
Skip to 5:19 and listen to what this GM VP of propulsion systems has to say.