SOHC.co.uk Forums > CB750
K7 Whats the Best Petrol ? Also Tips for Winter Storage ?
MarkCR750:
What about one of these?, that said surely removing the ethanol lowers the octane level doesn't it????
http://www.ebay.co.uk/itm/ETHANIL-STANDARD-KIT-remove-ethanol-from-petrol-yourself-/151831596991?hash=item2359de4fbf
AshimotoK0:
Spot on work there Greebo :) ...IMHO just what this forum is all about.
royhall:
Your spot on there Mark. Looking at advice from research, removing the Ethanol from E5 should lower the octane by one and E10 by two. So if you start with super unleaded it should be good for classics.
Does anyone know the chemistry of how this eBay device works? If its genuine, £50 is better than a new tank. And 18lts at a go is a useful amount as long as it only takes overnight. Doesn't help on a journey over 200 miles though. But those are pretty rare except for the annual trip to the Isle of Man, but their petrol is Ethanol free anyway.
AshimotoK0:
--- Quote from: royhall on October 03, 2015, 09:28:09 AM ---Your spot on there Mark. Looking at advice from research, removing the Ethanol from E5 should lower the octane by one and E10 by two. So if you start with super unleaded it should be good for classics.
Does anyone know the chemistry of how this eBay device works? If its genuine, £50 is better than a new tank. And 18lts at a go is a useful amount as long as it only takes overnight. Doesn't help on a journey over 200 miles though. But those are pretty rare except for the annual trip to the Isle of Man, but their petrol is Ethanol free anyway.
--- End quote ---
I will try to ask 'Chemical Bob' :D
Spitfire:
Ethanol likes water, it will absorb it until it gets to the point where it will form an ethanol/water phase in the petrol, this settles and can be removed, the water can be in the form of liquid or moist air, this can also happen faster at lower temperatures.
Cheers
Dennis
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