Mid Grade gas vs High Octane gas - better performance??

[jlagnese at massed.net (John S. Lagnese)]

The higher octane gas performs better. I even get better mileage. Its the 
knock sensor system. Higher octane can be more advanced timing.
----- Original Message ----- 
From: "Don Walter" <dswalterwi@gmail.com>
To: "Scirocco List" <scirocco-l@scirocco.org>
Sent: Tuesday, March 13, 2007 4:53 PM
Subject: Mid Grade gas vs High Octane gas - better performance??


> My son's 1.8L 16V swapped engine was running pretty good but he felt that 
> it
> was lacking power a bit in the mid to higher RPM's  Initially we thought 
> it
> might be either running too rich or too lean.  I haven't had a chance to 
> put
> a meter on it to find out.  Today he filled it with Mid grade (89 octane)
> gas and claims that it pulls strong all the way through the RPM range. 
> Does
> that sound right?  Does that support that it may have been too rich to 
> begin
> with and the more volatile fuel is burning better?  I don't want this to
> turn in to a science project discussion either so let's keep it at the 5th
> grade level.
>
> -- 
> Don Walter - Waukesha, WI
> 1986 8V Black Scirocco (Daily Driver)
> 1984 8V Audi 4000s (RIP 2/14/2006)
> 1986 2.0L 16V TEC 2 Black Scirocco (see progress at
> http://www.cardomain.com/memberpage/708939)
> 1986 2L 16V Toronado Red Scirocco (Ben's Car)
> 1988 1.8 16V Toronado Red Scirocco (sold on 3/29/04)
> 1984 1.8 8V Pewter Scirocco (sold years ago)
> 1971 Karman Ghia (sold)
> 1969 Karman Ghia (sold)
> 1969 Beetle (sold)
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