Octane is rated in two different units, RON (Research Octane Number) and MON (Motor Octane Number). In the US pumps are (RON+MON)/2 which is not a true octane rating is often called the anti-knock index. RON is usually about 10 points higher than the MON rating. So if the car requires 91 RON that would be the same as 86 (RON+MON)/2 I knew this Bosh hand book would come in handy, and everyone laughed at me when I pulled it out of the dumpster. Andrei ----- Original Message ----- From: "erikgeerdink" <erikgeerdink@xxxxxxxxx> To: <DMCForum@xxxxxxxxxxxxxxx> Sent: Tuesday, August 19, 2003 12:38 PM Subject: [DMCForum] Re: Fuel requirements > I use 87 and its fine. Somewhere I heard that 91 octane was > refering to UK standards (?) and that it actually is the equivalent > to 87. > I'm an idiot, so don't take my word for it. Its just what I heard. > > Erik > > > > --- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > > Do you guys all really put 93 octane in your cars, or have you > found > > that it doesn't really matter? > > > > The manual says "91 octane only" but all the pumps in my area only > > sell 87, 89, & 93 octane. I would think that 89 would be close > enough > > but..... > > > > Anyone notice any adverse performance or mileage from the lower > > octane fuels? > > > > Rich > > > > To unsubscribe from this group, send an email to: > DMCForum-unsubscribe@xxxxxxxxxxxxxxx > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=244522.3707890.4968055.1261774/D=egroupweb/S=170512 6215:HM/A=1595056/R=0/SIG=124p07ne0/*http://ashnin.com/clk/muryutaitakenat togyo?YH=3707890&yhad=1595056> Click Here! <http://us.adserver.yahoo.com/l?M=244522.3707890.4968055.1261774/D=egroupm ail/S=:HM/A=1595056/rand=833406516> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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