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Re: [ST] Mobil Premium Fuel



IIRC, my '02 RS owner's manual states that in the US, 89 R+M/2 equals 95 
RON.  You are correct that to two number are developed using different 
methods.  Motor Octane is determined using a single cylinder engine with 
compression ratio adjustable during operation.

Rod Brown wrote:
> Keith,
> This is kind of a question but not meant to be argumentative.
> Aren't you making an assumption that you have 95 RON and 83 MON to get that
> 89 Pump Octane???   I was always under the assumption that RON and MON are
> computed using different factors so that knowing one is not a guarantee of
> knowing both.
> It would be nice if Triumph would spec RON, Pump or whatever system used in
> countries where they were sold.
> 
> Just something to consider.  I ride in the boonies a lot.  I have even run
> into the old pump into a glass jar on the top of the pump stations in West
> Virginia.  In that case you run what they got.  It doesn't take an
> accountant to figure that the overwhelming number of stations sell more
> regular than premium.  Although I don't have any stats, I'd bet they sell
> more premium than middle grades.  The point being that you are probably
> pumping more crud than you would care to from premium gas than regular when
> you are at lower volume stations.  It's probably worse with the in between
> stuff.
> 
> Rod
> ----- Original Message ----- 
> From: "Keith Winter" <kwinter@xxxxxxxxxxxx>
> To: "Rod Brown" <ST@xxxxxxxxxxxxxx>
> Sent: Tuesday, July 08, 2003 10:24 AM
> Subject: Re[2]: [ST] Mobil Premium Fuel
> 
> 
> 
>>Exactly; it states 95 RON, not 95 RON + MON /2.  95 RON
>>equates to 89 R+M/2.  Don't waste money on more expensive
>>slow burning fuel.
>>
>>-Keith
>>'00 RS
>>
>>On Tuesday, July 8, 2003, 5:56:35 AM, Rod Brown wrote:
>>
>>
>>
>>>Howard, The Owners Manual for my 2002 says 95 RON.   The
>>>best I can find around here is 93 or 94 pump octane ( RON
>>>+ MON / 2 ) .
>>
>>
>>
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>>
> 
> 
> 
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- -- 
John Albright
'02 RS
Chattanooga
C-RATs Pack Leader


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