Dear all,
When I started nitro, I usually buy fuel from my LHS with a 5% nitro. After flying for some time, some of my friends recommended home mix fuel which I believe the composition is 1 part castor oil and 4 parts methanol. I found that after using the home mix fuel, my plane is all covered with black slug oil coming from the exhaust after one flight. This is not the case when using the 5% nitro. While there's still some oil covering the plane when using 5% nitro, it's not as much and black as using the home mix fuel. My friend say that the large amount of black slug is good for the engine as it more less help to lubricate the piston to make the engine last longer. In cases where nitro are use, it'll wear out the engine faster. The more nitro content, the faster the engine wears out. Please let me know whether this is true and if any experts out there can give me some theory on this issue, it'll be greatly appreciated.
Thanks in advance.