20-12-2021, 05:02 PM
(18-12-2021, 05:50 PM)sparkeysprite Wrote: I'm afraid that's just incorrect. The lower ethanol E5 petrol currently for sale is a higher octane (over 97 in the UK) than the E10 (95 in the UK). Lead based additives were banned in the UK more than 20 years ago - it had nothing to do with Ethanol..
Don't be afraid to be wrong. Your post is illogical anyway, the Octane rating of a motor fuel is governed by the amount of octane-boosting additive to the base petroleum.
In the past we used tetra-ethyl lead, long since outlawed and replaced mainly by MTBE, though health concerns because of the way it got into water systems led to its discontinuance. Today's common oxygen boosters are BTEX and, increasingly, Ethanol.