91 Octaine in 4KSCQ?!
ur-quattro at msn.com
Mon Jul 12 16:42:43 EDT 2004
> -----Original Message-----
> From: quattro-bounces at audifans.com
> [mailto:quattro-bounces at audifans.com] On Behalf Of Michael Ayukawa
> Sent: Monday, July 12, 2004 12:08 PM
> To: quattro at audifans.com
> Subject: Re: 91 Octaine in 4KSCQ?!
> 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.
What used to be posted on the pump was R+M/2. Or, the average of research
(R) and motor (M) ratings. Is that now called Pump Octane Number (PON)?
To add a bit of background, research octane ratings are higher because
they're derived from laboratory tests, under ideal and controlled
circumstances. Motor numbers are lower, because they are determined under
> Mike (95 A6 Quattro)
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