I like OS and Saito about the same. Both are terrific brands of engines. OS is over priced in the US because of the greedy importers and their pricing. I remember back when World Engines passed along its distributorship to the Great Planes conglomerate and the OS engine prices increased by one third over night. OS prices, nor Tower Hobbies have been the same warm and fuzzy folks that they used to be.

I'm not ready to buy into the castor oil being bad for four-stroke model engines just yet. I've only been using castor oil in four-strokes for twenty some years. A lean engine run can cause damage regardless of the oil type.


Ed Cregger