I'm not sure which has more, I don't think they would have a different Ethanol content to be honest as it would be the petrol part that is different and I think it is law now that petrol has 15% ethanol.
I know the cars at work old 1950's and 60's Bentleys have an overflow pipe in the fuel system, once it has got to temp and you turn the car off the ethanol carries on bubbling away as it has a lower boiling point and drips out of the overflow pipe. So yeah I have ethanol dripping on me daily haha.
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