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Old 01-22-2012, 11:35 AM
jimefam jimefam is offline
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Location: Cumming, GA
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Mein Auto: 2011 550i on order
Originally Posted by Needsdecaf View Post
Does the ECU respond well to increased octane? I know that not all engines will advance timing and spark beyond what 93 will allow.

My Volvo R responded VERY well to increased octane levels. Guys would run Torco additive, which worked well but left a reddish film on the tailpipes...which means who knows where else it was leaving a film.

Guys running race gas used to call it "cracktane", lol. The added pull was noticeable.
It does seem to enjoy the race fuel, when the local track opens up I'd like to test and see if it really does add power or if it's a placebo effect but subjectively I'd say it makes a difference.
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