Modern Vespa

What would 100 octane do to a mp3?

Just curious!

Just waste your money. Octane is simply a measure of how easily the mixture ignites (a very simplified definition here of course). A lower octane ignites easier, a higher octane less so. With higher compression engines you need the resistance to igniting prematurely as the act of compressing the air fuel will heat it up. All you need is what you need. Unless you are borderline going to a higher octane provides no benefit.

Agree 100%

make your cost per gallon go way up. up near the Dragon people can get 110 Dragon Gas for $8 gl when 93 oct. was $ 2.80

LOL and of course some idiots were buying it. Sharp business owner there! I was thinking of Sunoco from another comment - we used to actually need and use their 104. That was our gold standard for the machines we were running with 11.5 up to 13 compression.

The higher altitude you're at the less octane your motor needs because the air is thinner. At high altitudes you can't even get 91 octane gas if you want it.