Then a lower octane like 87 or 89 is ok for DeLoreans because they only have a compression ratio of 8.8:1 in un-turbocharged format, Right? --- In DMCForum@xxxxxxxxxxxxxxx, "Andrei Cular" <acular@xxxx> wrote: > That would be wrong information. I have to run 91 in my 944 and it is only > a 4 cylinder, but has a 10.9 to 1 compression ratio. Octane has to do with > how easy the gas would auto-ignite (think diesel), and this is what causes > knock or ping (pre ignition). And it will destroy an engine very quickly. > Remember just cause you don't hear the ping doesn't mean it isn't hammering > away at the internals of your engine. > > If you want a general rule to go by, the higher the compression ratio the > higher the octane. Or if you have a low compression ratio turbo charged > engine, the more boost the higher the octane. > > > Andrei > > > > > ----- Original Message ----- > From: "Farrar Hudkins" <fhudkins@xxxx> > To: <DMCForum@xxxxxxxxxxxxxxx> > Sent: Tuesday, August 19, 2003 1:31 PM > Subject: Re: [DMCForum] Fuel requirements > > > > I was told a rule of thumb by my old mechanic that 87 octane is good > > enough for four cylinders, 89 for six, and 93 for eight cylinders. > > That's probably wrong, though, so I'd like some clarification. However, > > I've used 89 Octane fuel in all my six-cylinder engines after trying > > both ends of the spectrum and believe that it's a good match for fuel > > economy and efficient burning. > > > > Off-topic note: Happy birthday to Gene Roddenberry, author of the most > > famous split infinitive of all time. ;) > > > > Farrar > > > > cruznmd 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/ > > > > > > > > > > > > > > > > > > > > -- > > Farrar Hudkins > > Announcer/Producer > > 89.9 WWNO FM New Orleans / 90.5 KTLN FM Thibodaux-Houma > > Live audio stream @ www.wwno.org > > > > > > > > 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=1595054/R=0/SIG=124ukap9t/*http://ashnin.com/clk/muryutaitakenat togyo?YH=3707890&yhad=1595054> Click Here! <http://us.adserver.yahoo.com/l?M=244522.3707890.4968055.1261774/D=egroupm ail/S=:HM/A=1595054/rand=214033383> 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/> .
<<attachment: winmail.dat>>
Back to the Home of PROJECT VIXEN