Im a klotz distributer and can assure you that you should never have an engine failure to oil! its always the person mixing the oil or just worn out parts! I dont think there is anything wrong with any of the oils mentioned in this thread, they all have there purpose and application, but Klotz technology and years producing a superior product has superceeded the competition by far. #1 is r-50( best full syn 2 stroke oil there is!) #2 super tecniplate(superior next to r-50 just has a different blend) #3 Benol, Excellent castor oil with "racey scent" but does tend to carbon up with deposits.
have fun and mix your fuels appropriately please, and dont blame the oils!!!