defnatly not you eill need to replace the conrod and bearings at the first hint of the bearings getting noisie and replace the conrod and piston pin and clip or clips when the conrod starts to get excessave play. Ive said it befor sirio piston and liners are very good the last a long time even the aac ones. You could run the 14% oil fuel but it will slow the engine down and make it run hotter. the oil mix in fuel can make a huge difrence to running temp qute ezaly 20 deg C form some oil mixes to outers. Just check the engine regulary for ware and condishion and clean and after run it. and tune it well and it will last a long time. Best Regards Jeremy.