No, 1% was not a typo. Those engines run best on 11% oil, I didn't have the balls. I run them at 13% I also found out they run 40 degrees cooler with the 1% castor. The oil I found most successful was a total of 13%. Best temps, best starts, most consistent.

Now, I must also add that I only run my glow machines with a header tank and the "Uniflow" system. This gives a consistent pressure to the fuel system and the engine is constant.

Rossi themselves recommend 10% castor.

Reliability? Treated properly and as outlined above, I only had to auto in one time in 7 gallons of fuel, and that was my fault. Jack