Yeah,I kinda' figured they were built better than weed trimmers and chainsaws.And I've always been good about making an engine last by warming it up slowly and using the best oil and quality gas with no ethanol.But you know,I've never taken an engine apart that had less wear than this Franco-Morini at the wrist pin.Not even any scuffing on the bearing cage(looked like new).The bike had sat for years and then I put another 2000 or so on it,and the needle bearing looked like new.The lower rod bearing also had no play that I could detect.Must be the 40:1 Pennzoil Marine Synthetic.It's 2.99 at Wal-Mart for 16oz.,and I think it must have been worth it.I WOULD run Amsoil but the price,OH,the PRICE!(:^)