91 Octaine in 4KSCQ?!

[Michael Ayukawa]

Hi,
I believe the european std for octane is
RON (research octane).  In US, it is PON
(pump octane).  PON is the average of 
MON (motor octane) and RON.  RON is gives
a higher number than MON.  
A RON of 90 is approx equivalent to PON of 86.6
A RON of 92 is approx equivalent to PON of 88.5
I have run another german vehile with a 
RON requirement of 91 on 'mid grade 87' without
any ill effects for a number of years.  No
antiknock sensor on this engine.

HTH.
Mike (95 A6 Quattro)



		
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