mglavin
Posts: 5203
Joined: 11/29/2001
From: Elverta,
CA, USA
Status: offline
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Sam
You indeed had an unfortunate mechanical problem with your Saito 150, rest assured that it was a mechanical problem and not an oil related one.
I mean really, lets think about this; 12 ounces of fuel and you hang a valve... More than likely one of two things transpired and led to failure of your Saito.
1] Excessive heat realized from an over-propped, lugged and or a lean engine run caused the valve to stick. An exhaust leak at the cylinder head/muffler flange would also cause this to happen.
2] A mechanical failure due to manufacturing tolerances, faulty materials or parts, incorrect or inaccurate assembly procedures and or a lack of lubrication...
If you consider the 12 ounces of fuel you used was a premium synthetic-castor mix and is blended to yield an 18% by volume mix of oil that consist's of 95% synthetic and 5% Castor of the 18% percent oil. You'd have to burn alot more fuel, which was heavily laden with Castor oil to hang a valve and or even realize a residue. The actual percentage of Castor by volume is 0.9% with the Wildcat Premium Fuel you used...
Lets look at this from another standpoint, you send in your new toy engine and the techies [parts changers] repair it. They send it back with a note suggesting the Castor oil hung the valve rather than admit it may have actually been a manufacturing defect and or user mishandling. Everybody wins and Castor Oil is the scapegoat.
In the real world a good engine tech most likely would have been able to narrow down the actual cause and affect of your engines demise. In the service and manufacturing world its always the other guy's fault...
I've been using Castor Oil mixes as referenced above without ever having an oil related engine failure. I use and abuse my engines for pylon racing and sport use. The Castor Oil blended with Synthetics has many notable advantages. In the percentages quoted I cannot imagine any problems that one could or would assert was Castor Oil related... I have the used and abused engines to back this assumption... We beat the heck out of our YS Engines, do you know of other's that are using 65-80% Nitro, blended oil fuels with the 91's screaming at 12,000 plus and the 120's seeing 11,700rpm turning high pitch APC racing props??? The heat and abuse these engines see is far more detrimental than the average sport flyer's will ever see, far more...
Castor Oil is alive and well... It holds up to high temperatures, provides a rust inhibiting action and offers superior lubricating qualities in the face of harsh operating environments...
Synthetics are excellent oils, although they lack all of the qualities mentioned above... Therefore there is room for improvement...
Most flyer's utilizing a fuel blended with Synthetic oil will find it provides an adequate oiling package and guarantees trouble free service for many years to come... Then there are those other guys that want more... 
Have Fun 
< Message edited by mglavin -- May 30 2002 10:31PM >
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> YS Engines and 20/20 Fuel 
YS Engines and 20/20 Fuel - 
YS Engines and 20/20 Fuel - 
YS Engines and 20/20 Fuel - 
For what it is worth - 
