SalvageSV
Hopes he doesn't crash this month
That's a pretty good vid.From Oz but applies to all...
This is my take on it...
If the vehicle is designed for X octane rating and is left as it came from the factory, run X fuel. You don't need extra octane.
If the vehicle's engine, intake, exhaust is modified and it's not retuned for a specific fuel, it's a safe choice to run higher octane fuel.
If the vehicle is modified and tuned for a specific fuel, use the fuel octane it's tuned for and no lower.
And, overall, most any vehicle (aside from crazy high hp race vehicles) can run on regular, lower octane fuel as long as the engine is not stressed. So if you only cruise around and never pass, go up hills or rev high, feel free to run low octane on your high compression modified bike. But, as soon as you roll on the throttle you could risk damage from detonation.
And the video mentions that all fuel is shipped in in AU. In the US that's not true. I'm not sure about other places. But in the US the multiple octane ratings are all similar in terms or the mix and detergents. Some premium fuels have additional detergents to help keep things clean, but it's not that much different than the cheap stuff. Bullshit, as the video says.