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Fuel
Feb 16, 2018 23:59:31 GMT 1
Post by 125lc1dt on Feb 16, 2018 23:59:31 GMT 1
Is there advantages in using super unleaded (98) octane in these engines ?
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Fuel
Feb 17, 2018 8:36:55 GMT 1
Post by earthman on Feb 17, 2018 8:36:55 GMT 1
I gather that it's just down to the ethanol or should I say lack of it and not destroying 80's rubber seals etc.
A guy at my work runs an old Austin Seven, he said that it's only Esso super unleashed that's got zero ethanol in it, all the other companies put a small percentage in theirs. I have no idea if that is true.
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Fuel
Feb 17, 2018 19:27:08 GMT 1
via mobile
Post by Bertie Wooster on Feb 17, 2018 19:27:08 GMT 1
Ethanol is free in esso pumps unless you live in Devon Cornwall Teesside area and Scotland
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Fuel
Feb 17, 2018 19:37:19 GMT 1
Post by earthman on Feb 17, 2018 19:37:19 GMT 1
Ethanol is free in esso pumps unless you live in Devon Cornwall Teesside area and Scotland Thanks, that's interesting, I wonder why it isn't in those areas that you mention then.
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Fuel
Feb 17, 2018 20:58:07 GMT 1
via mobile
Post by Bertie Wooster on Feb 17, 2018 20:58:07 GMT 1
That what I read from esso customers services
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Fuel
Feb 18, 2018 9:57:26 GMT 1
Post by guiri on Feb 18, 2018 9:57:26 GMT 1
its got nothing to do with ethanol the octane of the fuel, the higher the octane the more stable the combustion at high revs. all high revving engines benefit from higher octane fuel. if you ride your bike normal 95 is ok, if you rag the tits off it you need 98. ethanol has been added purely to keep ecologists happy.there is no other need for it. american race cars that run on pure ethanol for more power is a whole different matter.
john
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Fuel
Feb 18, 2018 10:08:06 GMT 1
Post by earthman on Feb 18, 2018 10:08:06 GMT 1
its got nothing to do with ethanol the octane of the fuel, the higher the octane the more stable the combustion at high revs. all high revving engines benefit from higher octane fuel. if you ride your bike normal 95 is ok, if you rag the tits off it you need 98. ethanol has been added purely to keep ecologists happy.there is no other need for it. american race cars that run on pure ethanol for more power is a whole different matter. john If it's not ethanol that's destroying seals and forming globs of nasty looking stuff in float bowls and jets etc, what is??
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Post by marrcel on Feb 18, 2018 10:20:15 GMT 1
Well mbte and etbe are aethers which can swell some rubbers. Ethanol keeps also burning temperture low. Which is what you want. The downside is that ethanol attracts water in your tank. In winter i park my bikes with non ethanol. Such as 102 octane firezone. And in summer on track i use e95 or e98.
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Fuel
Feb 18, 2018 10:42:35 GMT 1
Post by guiri on Feb 18, 2018 10:42:35 GMT 1
its got nothing to do with ethanol the octane of the fuel, the higher the octane the more stable the combustion at high revs. all high revving engines benefit from higher octane fuel. if you ride your bike normal 95 is ok, if you rag the tits off it you need 98. ethanol has been added purely to keep ecologists happy.there is no other need for it. american race cars that run on pure ethanol for more power is a whole different matter. john If it's not ethanol that's destroying seals and forming globs of nasty looking stuff in float bowls and jets etc, what is?? i wasnt referring to that issue. its clear ethanol is an aggressive additive. the original post asked about the advantages of 98 ron.
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Fuel
Feb 18, 2018 11:05:24 GMT 1
Post by earthman on Feb 18, 2018 11:05:24 GMT 1
If it's not ethanol that's destroying seals and forming globs of nasty looking stuff in float bowls and jets etc, what is?? i wasnt referring to that issue. its clear ethanol is an aggressive additive. the original post asked about the advantages of 98 ron. Ah, I see. Aren't these advantages kind of irrelevant though, if you end up with a gummed up, non firing engine in the first place? Maybe filling your tank with petrol containing ethanol and using it all within say a day is OK, is that safe to do??
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begbie
Drag-strip hero
Posts: 249
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Fuel
Feb 18, 2018 13:21:26 GMT 1
Post by begbie on Feb 18, 2018 13:21:26 GMT 1
its got nothing to do with ethanol the octane of the fuel, the higher the octane the more stable the combustion at high revs. all high revving engines benefit from higher octane fuel. john This Is Simply incorrect for the OP's stock bike. Octane rating is a fuels resistance to Knocking (pre ignition) If an lc engine has a higher compression ratio and/or your running a programable CDI with advanced timing then it may be able to make use of a higher octane fuel, however if you were to put very high octane race fuel in a stock LC with its relativly low compression and poor bhp per litre figures, you could actually loose a little power as whenever you increase the resistance to uncontrolled ignition (burning), you are in most cases effectively lowering the energy content of the fuel.
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Fuel
Mar 1, 2018 10:05:49 GMT 1
Post by mudguts on Mar 1, 2018 10:05:49 GMT 1
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Fuel
Mar 1, 2018 17:08:53 GMT 1
Post by copper99 on Mar 1, 2018 17:08:53 GMT 1
...and to confuse matters further, there is a letter in this months PS mag from a chap who works in the industry and states only 97RON fuel is ethanol free....no matter what the brand.
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Post by copper99 on Mar 1, 2018 17:15:34 GMT 1
i wasnt referring to that issue. its clear ethanol is an aggressive additive. the original post asked about the advantages of 98 ron. Ah, I see. Aren't these advantages kind of irrelevant though, if you end up with a gummed up, non firing engine in the first place? Maybe filling your tank with petrol containing ethanol and using it all within say a day is OK, is that safe to do?? Jeez man, you gotta stop worrying so much...a day?! I use any fuel in my LC , if you ride them, you haven't much choice if your out and about for the day... I drain the fuel over Winter from the tank and carbs, inbetween that, it can sit in the bike for many weeks or a month or so..Yes, I have changed a fuel tap during those 6 years but that was wear and tear, not from anything rotting out.
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Fuel
Mar 1, 2018 20:12:04 GMT 1
Post by earthman on Mar 1, 2018 20:12:04 GMT 1
Ah, I see. Aren't these advantages kind of irrelevant though, if you end up with a gummed up, non firing engine in the first place? Maybe filling your tank with petrol containing ethanol and using it all within say a day is OK, is that safe to do?? Jeez man, you gotta stop worrying so much...a day?! I use any fuel in my LC , if you ride them, you haven't much choice if your out and about for the day... I drain the fuel over Winter from the tank and carbs, inbetween that, it can sit in the bike for many weeks or a month or so..Yes, I have changed a fuel tap during those 6 years but that was wear and tear, not from anything rotting out. Lol, I wouldn't say that I'm worrying about it as such, just trying to establish 'what's the right thing to do', after hearing of problems that other owners have had.
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Fuel
Mar 1, 2018 21:38:59 GMT 1
Post by copper99 on Mar 1, 2018 21:38:59 GMT 1
Jeez man, you gotta stop worrying so much...a day?! I use any fuel in my LC , if you ride them, you haven't much choice if your out and about for the day... I drain the fuel over Winter from the tank and carbs, inbetween that, it can sit in the bike for many weeks or a month or so..Yes, I have changed a fuel tap during those 6 years but that was wear and tear, not from anything rotting out. Lol, I wouldn't say that I'm worrying about it as such, just trying to establish 'what's the right thing to do', after hearing of problems that other owners have had. I agree it is a problem, to put it in perspective, your only ever going to hear about people having problems, its not much news saying your bike starts & runs OK on 2 day/week/month old fuel with no issues.
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