SXIBLK
Member
Registered: 9th Feb 10
Location: Barnoldswick
User status: Offline
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if you get the unleaded plus or whatever the garage calls it what are the actual benefits is it worth paying a little extra ??
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3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
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i seemed to get less miles from a tankful of it and noticed no difference in performance etc
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Neo
Member
Registered: 20th Feb 07
Location: Essex
User status: Offline
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Is it not just a higher octane which some engines require to run at their peak ?
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SXIBLK
Member
Registered: 9th Feb 10
Location: Barnoldswick
User status: Offline
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i thought i heard you get more miles to gallon with it ?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
User status: Offline
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I get more smoke and no extra miles from ultimate diesel
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SXIBLK
Member
Registered: 9th Feb 10
Location: Barnoldswick
User status: Offline
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not worth paying the extra then ?
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3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
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i don't think so, and people tell me my car should be better on the higher RON fuel, but i think its people imagination.
am sure i've heard its more worth while on turbocharged engines
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ed
Member
Registered: 10th Sep 03
User status: Offline
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You use a fuel with a higher RON in high compression and turbocharged engines. the RON relates to the fuels resistance to burning under compression. For instance diesel is something like 20RON because it's meant to burn when compressed. If you put a low RON petrol in a turbocharged engine which was running high boost and a little lean for good measure you would risk detonation, where the fuel pre-ignites and explodes. This will destroy an engine in seconds.
There are probably no road-cars that come out the factory which really need the 98RON and 99RON stuff, no matter what the internet tells you.
[Edited on 09-06-2010 by ed]
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Colin
Member
Registered: 4th Apr 02
User status: Offline
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Only need to buy it if your cars designed to run on it else its a waste.
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Colin
Member
Registered: 4th Apr 02
User status: Offline
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quote:
Originally posted by ed
There are probably no road-cars that come out the factory which really need the 98RON and 99RON stuff, no matter what the internet tells you.
[Edited on 09-06-2010 by ed]
My impreza had to have super unleaded else it would run like shite....very noticable lack in performance & horrendous back firing from the car.
M3's meant to run on it but can take normal unleaded fine with just a comprimise in performance.
More interestingly my 1991 Golf GTi said to use only super......it was a 8 valve 4cyl engine with 125bhp? ffs 
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3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
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yes colin my corrado has a 98ron sticker in it
but i use 95
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chr15barn3s
Member
Registered: 5th Oct 03
Location: Farnborough
User status: Offline
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I couldn't tell you the difference in my car as it has only been run on shell V-power since it came out of the factory. It is mapped now though so can't be run on the 95ron. Supposed to better for the engine and cleaner with more miles to the tank, but then they would say that to get you to buy it.
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