Nick, I truly wish that Aerosave oil, or its equivalent, was available here in the USA.

The varnish formed by castor oil is many times the result of overheating the engine. Castor oil has no reason to turn
into varnish if not overheated.

Many modelers tune their engine based upon performance at the beginning of the flight and forget that the engine is
going to go leaner and leaner as the flight goes on. The result is high temperatures half way through the flight that
causes castor oil to varnish. Varnishing is a good thing when compared to what happens to the engine when these
high temperatures are present with only American synthetic oils available to the engine.

The ST G2300 is just a large glow engine that was designed for sport/scale applications. It serves that function well too. I
would not spend a lot of money on it trying to turn it into something special. If I really needed something special in this
displacement class, I would be tempted to purchase the OS 1.40RX. Instead, when I needed another engine in this class, I
did purchase an OS 1.60FX. Nothing special, but more powerful, easier on fuel and in an attractive package.


Ed Cregger