Well i cant help myself, i have to comment on this part of the oil thread. I believe alot of that article to be true on many levels. The rato/jetting and oil choice are crutial to the life of any motor in any application. I have seen first hand the differences of these ratios with. proper jettings effect on the internal parts of the motor. The same cr250 on the same track ran at 80:1 and tuned for it made it one day of racing. I tore it down to find alot of scuffing same motor rebuilt fully same brand parts and tollerances raced a full season at 32:1 and could have went longer. wether it be a saw a weedwopper a leaf blower pwc snowmobile and wether liquid cooled or air or even free air all have different needs for a given application. I truely believe i need to learn more on the topic but my tools and toys are living proof of proper oil choice with correct tuning/jetting for the given application give a long service life. I have learned a ton at the expence of top ends on stuff, but i learned how to find the cause of the failure not blame. Generally a gently used 2smoke can live at lean premix ratios but as soon as a long wfo pull it will show its evil face. Just because people have not had failures at 100:1 does not mean its good/ok maybe is because they still have enough laying in crank case to supplament the missing nessary oil for those long wfo pulls without a seizure. I have never pulled down my buddys stuff to see whst happens at abuse on 100:1. I do know my bikes got more oil the longer the strait aways were or where my rpms were going to be. Now a pwc sees heavy load all the time and drastic temp changes throughout the run but are set up much looser clearance to help with the changes. Also get different guality oil an a different ratio. I use many ratios for the same piece of equipment and many different jetting combos for the application. Saws are very close to the oil needs of a free air snowmobile raced in oval races where high rpms, high cyl temps, and high egts are presant which im my eyes would need a egd fd or fd oil at 25:1-32:1 to stay safe. Richer ratios jetted for the mix change provide more hp and longer service life. Then the required api tc or tcw3 oil it called for 40:1 stock for stock use. So better oil for high heat and more oil to keep alive for the application i used it for. In my group i have been able to keep motors together running many more hours then others thst followed mfg recs. They are nott always right. Testing and r&d. keeps us learning new things and hopefully ahead of the curve. Thank you. Sure i missed alotbof what i wanted to get accross to you all. Please take to heart atleast some of what i speak.