Weird Octane Levels?

[mrsleeve]

Ahhhh but there are O2 sensors made for leaded fuel

[Pinepig]

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.

[mrsleeve]

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

[BlueBMW]

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

[nando]

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.

[JasonC]

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

[rustybullet]

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)

[JasonC]

I'd use the highest grade available unless you're at sunoco or something and they're selling 100 octane race gas for $7 per gallon.

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!

[mrsleeve]

^^^^^^^^^^^^^^

now your catching on

[mamzak]

yup E85 only has 85% of the stored energy of an equal amount of Straight petrol Gas

God damn environmentally conscious people robbin' our gas mileage. :(

[mrsleeve]

hmm! Crazy, I didn't know you got worse gas mileage with more ethanol.

Thanks r3vsterz!

yup E85 only has 85% of the stored energy of an equal amount of Straight petrol Gas

[Alkasquawlik]

Anything above 93 (including 93 level) will work fine. Just don't go below.

[mamzak]

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,

hmm! Crazy, I didn't know you got worse gas mileage with more ethanol.

Thanks r3vsterz!

[mrsleeve]

Oh really? As far as I know anyways in Canada you don't need ethanol. Usually at the pump you see 87, 89, and 91. I was told that since my 91 318is has a 10:1 compression ratio it needs premium to prevent knocks and shit, so usually I run 91, except now the place by my house got new pumps and are using ethanol I guess.

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,

[Adrian_Visser]

all gas has Ethanol in it, up to 10% by law. Shit you are a newfy ( I ked ked) I dont know what your laws are on that. Thats how it is in the states.

You dont need to run anything more than 87 when running Bone stock non chipped. If you are running a 93 octane chip, anything more than will not hurt it at all.

Newfy haha.

Oh really? As far as I know anyways in Canada you don't need ethanol. Usually at the pump you see 87, 89, and 91. I was told that since my 91 318is has a 10:1 compression ratio it needs premium to prevent knocks and shit, so usually I run 91, except now the place by my house got new pumps and are using ethanol I guess.

You don't need to run premium unless you have a chip brah.