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Thread: minimum octane rating (R+M)/2 method 90 ?

  1. #16
    apriliaforum newb
    Join Date
    Sep 2008
    Shawnee Mission, Kansas USA
    Higher octane is only for higher compression engines.
    2009 Aprilia Mana
    2008 Kawasaki Versys
    2006 Yamaha YZ125
    2005 Yamaha TT-R125
    2003 Gas Gas 280 TXT Pro
    2003 Kawasaki KLX400SR - Motarded & Dirtarded!
    2001 Kawasaki W650
    1996 Gas Gas Pampera
    1984 Honda Spree
    1972 Benelli Mini Enduro (basement art)

  2. #17
    apriliaforum expert
    Join Date
    Jan 2009
    The only advantage of high octain is to prevent detonation (pinging). if you have a high compression engine it will tend to detonate, hence the premium fuel required. On older engines you could also advance ignition timing which would increase performance, but also increase det. so premium was required. There is no advantage to run premium if you don't have to. It's a myth that an engine that doesn't require premium will run better on premium, It's just the opposite.

  3. #18
    apriliaforum Member
    Join Date
    Aug 2008
    Pittsburgh, PA
    Thank's for the info guy's

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