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Anyone ever used 100 octane in their RS4?

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Old 09-16-2008, 06:58 PM
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Default Anyone ever used 100 octane in their RS4?
I'm going drag racing this Friday and I'm thinking of putting a few gallons of 100 octane in just for the heck of it. I figure it can't hurt with the 12.5:1 compression ratio. Engine/exhaust is stock.

Anyone notice a difference?
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Old 09-16-2008, 07:15 PM
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I'd be surprised if you didn't notice a little difference running 95 or 96.
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Old 09-16-2008, 07:18 PM
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Default With any of the audi's you will need to give it 50-75 miles to adapt. Also if you have a vag com
after you fill up go into engine, get the codes (even though there may not be any) and clear them. It will reset the fuel trims and adapt to the 100 much faster.
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Old 09-16-2008, 07:30 PM
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Hrm no VAG com
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Old 09-16-2008, 07:47 PM
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Default I put in 104 once in my S4
It was a waste of $4 a gal (price was almost $7 a gal) at the track when I was getting 6.5 mpg. I went back to 93
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Old 09-16-2008, 07:56 PM
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Default Probably the biggest benefit you'll get is
The sweet smell of 100 octane exhaust. It has a smell all it's own.
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Old 09-16-2008, 09:55 PM
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Default yea last year 104 octane. and a couple of misfires & engine stalling sitting
at a traffic lite. i filled up from an empty tank.but u will notice a BIG power gain.
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Old 09-16-2008, 11:14 PM
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Default You can do the same thing by pulling the battery. Please post your times at the 1/4 mile
I'd be interested to see what a stock rs4 can do.
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Old 09-17-2008, 01:20 AM
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Some b6 S4 track junkies have done it claimed significantly greater "pull" thru the gears.
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Old 09-17-2008, 05:13 AM
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Especially in 3rd gear!
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