[Dukedesmo]

'Tis indeed bad, luckily all my bikes have metal tanks (probably rust through instead now).

I use super unleaded in all of them; 916 because high-comp and was tuned specifically for it, Monster because it has high-comp pistons and so favours higher octanes (I know they can tend to pink on lower octane fuels) and the Guzzi because it also is fairly high-comp plus it was built in the '70s in the days of 5-star leaded fuel.

It costs a bit more but for my bikes I don't mind paying the extra and I don't do huge mileages either so really a great cost increase.