My snow blower is kept in a semi-heated garage so I've been using Rotella 10W-30. It starts on the first pull, if the carb is not messed up with E10. It's a small engine, 179cc, that works hard but does the job and it doesn't use any oil. The short first OC had some minor metal in it. After that there has been no metal in the oil with this Chinese made Power More engine. I have to say it runs really well and does a good job especially after I added the impeller kit, what a difference that made to the snow throwing ability with this small engine.
Whimsey