Weird Octane Levels?

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  • rustybullet
    Wrencher
    • Apr 2010
    • 218
    #16
    Originally posted by JasonC
    I just go to the airport and get 100LL. At $3.90 a gallon, and has lead, i'm happy. Although can't run it in a efi car. But the ol Corvair likes it!
    your corvair is hot! how does it compare to the e30? you can pm me if you like. (thread jack)

      Comment

      • JasonC
        Site Manager
        • Aug 2006
        • 14451
        #17
        Originally posted by rustybullet
        your corvair is hot! how does it compare to the e30? you can pm me if you like. (thread jack)
        Here, i'll just bump this thread so we aren't thread jacking this one lol. http://www.r3vlimited.com/board/showthread.php?t=98443

        1992 BMW 325iC
        1978 Chevrolet Monte Carlo
        1965 Chevrolet Corvair Monza 140hp

          Comment

          • nando
            Moderator
            • Nov 2003
            • 34827
            #18
            Originally posted by mrsleeve
            Yes thats all we see here too (unless its e85 or has more than the 10% ethanol)

            Sure you can run a little better fuel in it, but its not really necessary. The euros call for 91 octane in the M42 but they only calculate the RON. We here in the states average the RON and the MON for our Octane numbers. Just run the mid grade fuel to be on the safe side if you must. IIRC the rating for M42 on RON+MON/2 is a 90 octane. So yeah you should be on the mid grade fuels while stock

            Adrain is right about the BTU with the higher Octane Attained with higher concentrations of Ethanol, you will lose milage with the more ethanol in your blend you are running.

            In my 1st post thought you had a m20


            Neo: Yes there may be some places that are still running 100% petrol, but its not the norm, most have the 10% ethanol in them,
            it says right in the manual to run premium for the M42. BMW wasn't stupid, they didn't forget that the US uses a different octane measurement than europe.
            Build thread

            Bimmerlabs

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              • BlueBMW
                Wrencher
                • Jan 2010
                • 219
                #19
                Originally posted by nando
                it says right in the manual to run premium for the M42. BMW wasn't stupid, they didn't forget that the US uses a different octane measurement than europe.
                Who reads the owners manual? :p
                '88 325ic - Vert in winter baby!
                '91 318is - Gone :(
                '95 530i - Gone :(

                  Comment

                  • mrsleeve
                    I waste 90% of my day here and all I got was this stupid title
                    • Mar 2005
                    • 16385
                    #20
                    Originally posted by JasonC
                    I just go to the airport and get 100LL. At $3.90 a gallon, and has lead, i'm happy. Although can't run it in a efi car. But the ol Corvair likes it!
                    fairly sure you can run it in a EFI car just not one with with CAT on it. I cant remember 100% though
                    Originally posted by Fusion
                    If a car is the epitome of freedom, than an electric car is house arrest with your wife titty fucking your next door neighbor.
                    The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de Tocqueville


                    The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken

                    Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
                    William Pitt-

                      Comment

                      • Pinepig
                        E30 Mastermind
                        • Sep 2007
                        • 1811
                        #21
                        Originally posted by mrsleeve
                        fairly sure you can run it in a EFI car just not one with with CAT on it. I cant remember 100% though
                        CATs and 02 sensors, the lead fucks them up eventually.

                          Comment

                          • mrsleeve
                            I waste 90% of my day here and all I got was this stupid title
                            • Mar 2005
                            • 16385
                            #22
                            Ahhhh but there are O2 sensors made for leaded fuel
                            Originally posted by Fusion
                            If a car is the epitome of freedom, than an electric car is house arrest with your wife titty fucking your next door neighbor.
                            The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money. -Alexis de Tocqueville


                            The Desire to Save Humanity is Always a False Front for the Urge to Rule it- H. L. Mencken

                            Necessity is the plea for every infringement of human freedom. It is the argument of tyrants.
                            William Pitt-

                              Comment

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