Date: Sat, 29 Jan 2005 21:15:40 +0000 From: Pooh Bear <rabbitsfriendsandrelationsnospamail.com> Subject: Re: Saab newbie
James Sweet wrote: > "Pooh Bear" <rabbitsfriendsandrelationsnospamail.com> wrote in message > news:41FBF11B.C8B6C704nospamail.com... > > James Sweet wrote: > > > > > "Pooh Bear" <rabbitsfriendsandrelationsnospamail.com> wrote in message > > > news:41FBE48B.881F4166nospamail.com... > > > > > > > > WhyAsk wrote: > > > > > > > > > I agree with the octane. I have a 2000 9-3 base and it does seem to > > > > > run a little better on premium (Marathon 93 octane). > > > > > > > > *93* octane is your idea of premium ???? :-( > > > > > > > > UK 'standard' unleaded ( often called 'premium' for some puzzling > reason > > > > ) octane is 95 octane - the premium version ( often called 'super > > > > unleaded ) is 97/98. > > > > > > > > > > > > Graham > > > > > > > > > > IIRC the octane ratings are different so you're comparing apples to > oranges. > > > 93 is the very best stuff you can get here. > > > > You mean US the octane rating method is different to UK octane ? Sounds > odd to > > me. > > > > Octane is a pure hydrocarbon. The octane rating is intended to compare the > > performance of gasoline ( made of many hydrocarbons ) to a known reference > as a > > percentage IIRC. > > > > Yes, just like your gallons are different than our gallons. > > http://www.jag-lovers.org/xj-s/book/Octane.html > > " Many people have read this and concluded that the car calls for Premium, > since the typical octane ratings in the U.S. are 87/89/91+ -- but that's > because they fail to notice the reference to RON. US gasolines are not > rated in RON; they are rated in the average of RON and MON, commonly marked > on the pump as (R+M)/2. Unless you know how to convert RON to (R+M)/2, the > spec in that handbook is meaningless. " Thanks for the info. I also found this http://www.btinternet.com/~madmole/Reference/RONMONPON.html Odd that the method hasn't been internationally standardised. Graham
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