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polisher |
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polisher Derestricted Danger
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doggone |
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doggone World Chat Champion
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Matt- |
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Matt- World Chat Champion
Joined: 19 Jul 2012 Karma :
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Posted: 16:27 - 22 Sep 2012 Post subject: Re: unleaded or super unleaded |
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Super unleaded has a higher octane rating than standard unleaded - but, to take advantage of the higher octane rating, you need a car / bike that is capable of adjusting its ECU to run on it accordingly. In truth, its only usually higher performance cars that will give you any benefit from it, as some cars simply cannot detect the higher octane.
You can use it in any car that takes unleaded, and it won't do any harm, but if your car / bike isn't capable of getting the benefit out of the fuel, then you are wasting your money.
To be honest it's a waist of money
Matt ____________________ RIP jack (wheelie king), you will never be forgotten.
Current Bike's - Road Legal TZR 125 Pitbike, Aprilia SR50R 2010 |
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janner_10 |
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janner_10 World Chat Champion
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stevo as b4 |
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stevo as b4 World Chat Champion
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_Iain_ |
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_Iain_ Banned
Joined: 01 Feb 2012 Karma :
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Posted: 18:51 - 22 Sep 2012 Post subject: |
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On a side note, the posh diesels actually DO make a difference over standard ones.
But as above. Can make a difference, is however very much unlikely to unless modified bike. ____________________ Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340 |
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Flatbadger |
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Flatbadger World Chat Champion
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Vincent |
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Vincent Banned
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WannaBeDude |
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WannaBeDude World Chat Champion
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Posted: 18:56 - 22 Sep 2012 Post subject: |
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SEARCH button - read - the 1000 threads on it !! ____________________ Jogging on, destination living. |
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flumpy7 |
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flumpy7 Could Be A Chat Bot
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Srengam |
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Srengam Scooby Slapper
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StevRS |
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StevRS Scooby Slapper
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MarJay |
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MarJay But it's British!
Joined: 15 Sep 2003 Karma :
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weasley |
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weasley World Chat Champion
Joined: 16 Oct 2010 Karma :
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Posted: 13:42 - 24 Sep 2012 Post subject: |
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Having a knock sensor does not necessarily equate to being able to benefit from higher RON. Simple knock sensor setups are just for protection of the engine; the ignition timing runs at a level suitable for 95 RON and the knock sensor only retards it if there's any knocking, from poor fuel, overloading etc. So the engine will never advance the ignition timing beyond the base timing, hence higher RON fuel will make no difference (other than preventing any knocks occurring).
More sophisticated ignition systems will dynamically advance the ignition to seek out the optimum timing; in these cases a higher RON fuel will be of benefit.
Let's also not confuse RON with quality. You can have highly-additised, quality fuel that is 95 RON and you can have cheap and cheerful fuel that is 97/98/99 RON.
Finally, a higher RON fuel can help an older engine out if it has, for example, any combustion chamber deposits. These deposits can get hot and act like a glow plug, setting off the air/fuel charge earlier than the spark plug. In these cases a higher RON fuel will resist this early detonation.
That said, for most bikes under most conditions, you won't get much or any benefit from higher RON fuel. ____________________
Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE |
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Rogerborg |
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Rogerborg nimbA
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WannaBeDude |
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WannaBeDude World Chat Champion
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Posted: 14:30 - 24 Sep 2012 Post subject: |
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Was going to ask - but figured it's gotto be, Shell - Tax and BP - ____________________ Jogging on, destination living. |
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StevRS |
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StevRS Scooby Slapper
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Rogerborg |
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Rogerborg nimbA
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Kickstart |
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Kickstart The Oracle
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Polarbear |
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Polarbear Super Spammer
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Llama-Farmer |
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Llama-Farmer World Chat Champion
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Posted: 20:26 - 24 Sep 2012 Post subject: |
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For the cleaning agents in the fuel, yes they're beneficial. But to increase the power, the ECU has to detect that it is a higher RON rating so it can adjust the ignition timing. Most cars and bikes don't do this, normally only "premium" ones. And turbos especially will benefit as they can increase boost without detonation.
(Fifth Gear test found 0 bhp/0% difference on a Renault Clio, 14bhp/6.4% difference on a Subaru Impreza WRX STi. More power = less throttle needed = less fuel used).
If the engine/injectors have built up contaminants and gum and stuff on them, they can reduce the efficiency of the engine, so once cleaned by the premium fuel (or fuel treatment additive) you may see a power and fuel efficiency increase, but this may be a result of the cleaned engine parts rather than the ECU changing the ignition timing.
Diesel is different though, whereas petrol RON is a measure of its resistance to detonation, diesel's Cetane is a measure of how quickly it burns, the quicker (higher Cetane rating) the better and will improve power regardless of the engine ECU. Another reason all diesels should use premium fuel is because it significantly reduces the contaminant buildups on the injectors and pumps, so can increase life and prevent failure of the parts even on old 10yr/200k mile cars.
TL/DR
- Worth using for the cleaning properties alone (but a fuel treatment/additive can be used instead for same effect)
- Will probably increase power and efficiency as engine/injectors are cleaned
- May increase power and efficiency even more if ECU can adjust ignition timing |
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JoeDougieDoug... |
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JoeDougieDoug... World Chat Champion
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Kickstart |
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Kickstart The Oracle
Joined: 04 Feb 2002 Karma :
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Posted: 20:53 - 24 Sep 2012 Post subject: |
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JoeDougieDoug... |
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JoeDougieDoug... World Chat Champion
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Kickstart |
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Kickstart The Oracle
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Old Thread Alert!
The last post was made 11 years, 216 days ago. Instead of replying here, would creating a new thread be more useful? |
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