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AVGAS UL 91 is Rotax 912 specific: Map of where sold in Fra

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robert.hitchcock(at)virgi
Guest

Posted: Thu Aug 11, 2011 1:31 pm Post subject: AVGAS UL 91 is Rotax 912 specific: Map of where sold in Fra

Hi

  

 Total France are  now rolling out the Rotax 912 specific AVGAS UL91  

  

 Read the article in the LAA  magazine  and after making some enquiries obtained this useful  link:

  

  http://www.total.fr/carburants/les-carburants-aviation/avgas-91-ul.html

  



 The link indicates the  aerodromes  that are selling it to date. Total France say  2 or 3  more airfields are to be converted  each month, often replacing  the existing AVGAS 100LL offering. From a Europa Rotax selfish point of view it  is good to see Europe is quickly moving in this direction.  Clearly  for most  Mogas still the preferred choice at home. But, having looked  at the lead deposits on my plugs recently, following fifty hours touring   using both Avgas 100LL and Mogas, happy to see a more Rotax  sympathetic option arrive for trips a long way from home. 

  

  

 Regards

  

 Bob

  

 GBYSA

   [quote][b]

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ward.t(at)xtra.co.nz
Guest

Posted: Thu Aug 11, 2011 2:06 pm Post subject: AVGAS UL 91 is Rotax 912 specific: Map of where sold in Fra

Hi,

Interesting to see Mogas 91 offered. We have Mogas 91 or 95 or 98, all unleaded. Which is the best to use for the Rotax 912s? I have been using the higher octane however the 91 is considerably cheaper if it is suitable.

Tim



Tim Ward12 Waiwetu Street

Fendalton,

Christchurch,  8052

New Zealand.

ward.t(at)xtra.co.nz (ward.t(at)xtra.co.nz)

Ph 64 3 3515166

Mob 0210640221





On 12/08/2011, at 9:26 AM, "Bob Hitchcock" <robert.hitchcock(at)virgin.net (robert.hitchcock(at)virgin.net)> wrote:



[quote]  Hi

  

 Total France are  now rolling out the Rotax 912 specific AVGAS UL91  

  

 Read the article in the LAA  magazine  and after making some enquiries obtained this useful  link:

  

  http://www.total.fr/carburants/les-carburants-aviation/avgas-91-ul.html

  



 The link indicates the  aerodromes  that are selling it to date. Total France say  2 or 3  more airfields are to be converted  each month, often replacing  the existing AVGAS 100LL offering. From a Europa Rotax selfish point of view it  is good to see Europe is quickly moving in this direction.  Clearly  for most  Mogas still the preferred choice at home. But, having looked  at the lead deposits on my plugs recently, following fifty hours touring   using both Avgas 100LL and Mogas, happy to see a more Rotax  sympathetic option arrive for trips a long way from home. 

  

  

 Regards

  

 Bob

  

 GBYSA

    	  Quote: 	
		  

	


[b]

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Remi Guerner

Joined: 14 Dec 2010
Posts: 284

Posted: Fri Aug 12, 2011 8:43 am Post subject: Re: AVGAS UL 91 is Rotax 912 specific: Map of where sold in

Hi Tim,

It is important to understand that AVGAS and MOGAS use two different scales for their octane number. 

RON  = Research Octane Number is used in Europe and some other countries for MOGAS. 

MON= Motor Octane Number is used worldwide for AVGAS.

Here in France, unleaded Mogas 95 is 95 RON and 85 MON.

Unleaded Mogas 98 is 98 RON and 87 MON.

From what you wrote, I assume this is the same in your country. Therefore, your Mogas 91 is probably 91 RON and about 81 MON.

On the other hand, AVGAS 100LL is 100 MON, and the new AVGAS UL91 we available in France is 91 MON. 

ROTAX says the 912 needs 90 RON minimum, and the 912S and 914 need 95 RON minimum. So those flying behind a 80 HP 912 can almost use anything, but for the 912S and 914 do not use any Mogas below 95.

The new UL91 AVGAS is a very good news as it offers additional margin against detonation, no additives which can damage hoses, gaskets, etc and a better quality control. Unfortunately the price is about 20% higher than the best Mogas.



Regards

Remi Guerner

F-PGKL

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