I actually read every word AND understood it all.Some of it,a little overkill in my case, non commercial or super large acreage,but sticking with the SAE 30.Thank you sgkent for that good lesson.Much obliged.
Hey Scrub,I actually have that info before but was confused.You straightened me out very clearly.THANK YOU,lol.As for engines I have a GCV 160 in my Husqvarna,and a 22 yo Lawnboy 10330.