ORIGINAL: Sport_Pilot
OS is not known for longevity.
For longevity try a Enya, Fox, or the older SuperTigre's (not sure about the Chinese versions).
Wow - I had no idea that OS had done a kamikazi raid on their justification for their high prices - guess I won't be buying another one any time soon!!!
The oldest engine I have still in use is an Enya 45 6001 that has two rings - it will probably out-last me!
I love my Super Tigres, but have never owned a Fox engine that I can remember...
Ringed is the way to go if you want an engine that will last - run it in right
