From: etxjema@kk270.ericsson.se (ETX-TT-K Andersson Mikael)
Subject: Re: Fuels-synthetic oils ?
Organization: Ericsson
Date: Fri, 16 Oct 1992 14:08:35 GMT

cstone@nodecg.ncc.telecomwa.oz.au (Charlie Stone 4915162) writes:

>In article <etxjema.719070320@kk270> etxjema@kk270.ericsson.se (ETX-TT-K Andersson Mikael) writes:
>>Hi,
>>I've just bought a new engine (OS32 ABC) and I'm thinking of using some synthetic oil. 
>>In "my shop" in Stockholm they sell fuel containing 95 % methanol and 5 % of a synthetic oil called Synex.
>>According to an article that I've read somewhere, 5 % of this synthetic oil is enough lubricant.
>>This is if you "break in" the engine with this fuel.
>>Now I'm wondering, in the instructions that came with the engine, the minimum amount of lubricant is 18 % of castor(?) oil, should I use this synthetic oil or stick with the usual stuff.
>>
>>The great advantage is that his models are not greasy after a flight.
>>
>>Is there anyone else that have any experience of synthetic oils.
>>
>>-----------------------------------------------------------

Hi again!
Now I've found the article that I read. The article is from a newspaper that the Swedish Model Fliers Association (SMFF) are the publisher of.

Here's some facts from the  article:
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Testengines: OS48 Surpass 4c, fuel consisted of 77.5 % methanol, 15 % oil and 7.5 % nitro.

The engines was run for 12 hours with every type of tested oil.

Castor:
	Possible to buy everywhere.Lower power than synthetic oils, the piston
	ring was worn blank after 6 hours. A new piston ring was mounted but the
	result was the same after another 6 hours. 

Carbulin:
	Possible to buy in Germany. No sign of wear out after 12 hours.
	Corrosion test gave Ph-value(?) 3.5 (The lower the worse).

Aero-Synth:
	Made by Graupner, expensive,No sign of wear out after 12 hours.
	Corrosion test gave Ph-value(?) 5 (The lower the worse).		

Synth-Glow:
	Possible to buy in Germany. No sign of wear out after 12 hours.
	Corrosion test gave Ph-value(?) 3 (The lower the worse).

Synex 165
	Made in Sweden by NYNAS. Not tested in this article. 
	From the beginning made for chainsaws that use methanol as fuel.
	A well known modelflier in Sweden use 5-7 % oil in the fuel.
	Another well known flier has run his Rossi 90 for 1500 hours (!) with 	
	only 3 % of the oil.
	Synex 165 have a chemical protection against overheating. If any part of
	the engine is overheated a hard and sticky resin are produced.
	This resin protects the metal. To remove the resin you have to take the 
	engine apart and solve the resin with oil. The oil is tested down to 
	-35 degrees celcius.

In general the Castor oil gave a lot of deposit inside the engine and the
engines run with synthetic oil was clean inside.

If you already run your motor on castor oil it may not be such a good idea to change to synthetic oil because the synthetic oils are thinner(But lubricants better). This is very important if you have an ABC engine.
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This was a brief translation of the article. I hope that you forgive some of 
strange language that probably accured in the article.

I don't have any connection with the manufacturer of any oil or other hobby
products.

After I've read this article again I've decided to try this fuel with Synex 165
and add some nitro. (5 %)
I intend to use my engine on a RC-plane.

If the interest of this oil is high I could contact NYNAS here in Sweden and find out if they could export some of this oil to the States or wherever.
Here in Sweden, the price for one litre of Synex 165 is approx. $25.
(Hmm... 5% oil, 1 litre is enough for 20 litres of fuel)

Those who are interested , please email me:

email:etxjema@kk.ericsson.se

BTW I don't give any garanties for the facts in the article above.

Regards
Mikael A
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Mikael Andersson               Ericsson Telecom AB
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Al Bundy: "Why go out for milk, when I have a cow at home ?"