100 octane fuel
08-01-2009, 07:33 PM
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My Ride: 2008 550i sport SAT
2012 535i Xdrive msport
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there is a gas station that pumps 100 octane racing fuel not too far from where I live. Has anyone used octane this high in their V8s. What kind of result may one see? Pros and Cons?
08-01-2009, 07:55 PM
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My Ride: 2008 Alpine White 550i Sport, Cream Beige Interior, 6-Sp Manual - retired 9/2011
If you try it, you can only use a few gallons of the stuff.....and then fill up with normal 91 or 93 for the rest.
08-01-2009, 08:42 PM
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Originally Posted by DrLev99' post='962468' date='Aug 1 2009, 11:55 PM
If you try it, you can only use a few gallons of the stuff.....and then fill up with normal 91 or 93 for the rest.
08-01-2009, 10:01 PM
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My Ride: I have an 05 545i. It's a manual with a few options. This is my first BMW but I don't know how I'll ever be able to switch to something else.
^^^ What he said.
Octane rating doesn't = horsepower. IF there's higher octane fuel, and IF you have the ECU tuned for that octane, then yes you will get performance gains. But on a stock car, it's worthless.
Octane rating doesn't = horsepower. IF there's higher octane fuel, and IF you have the ECU tuned for that octane, then yes you will get performance gains. But on a stock car, it's worthless.
08-01-2009, 10:42 PM
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I don't know about our cars specificaly, but I head the M cars can adjust for octant by adding timing until it detects knocking with its ion current flow detector spark plugs, with 100 octane, no knocking and full advance on timing. Proably just an M thing though
08-01-2009, 11:37 PM
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Originally Posted by dbae1978' post='962522' date='Aug 1 2009, 09:56 PM
Race fuel won't do anything unless you have a tune. Otherwise there will be no benefit
+1, and even if with a tune, recommended is mixing 100 and 91 (93 in other areas) and not going a full tank of 100 octane.
08-01-2009, 11:38 PM
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Originally Posted by jprovence' post='962605' date='Aug 1 2009, 11:42 PM
I don't know about our cars specificaly, but I head the M cars can adjust for octant by adding timing until it detects knocking with its ion current flow detector spark plugs, with 100 octane, no knocking and full advance on timing. Proably just an M thing though