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As most 2 strokes from the fizzy era were ok to run on the old 2star petrol I would think a lower octane fuel would be ok to run unless you've raised the compression ratio on your enginemech73 wrote:You can remove the ethanol using it's affinity to water. However although it's not the main reason it's used, ethanol raises the octane value, so the oil companies don't have to use as much alternative octane booster to achieve the 95 rating. Removing the ethanol will therefore lower the octane level. I don't know by how much and this may or may not matter, but it's worth being aware.