Polaris has always sold good lubricants for their chaincases. Years ago, in the days when there were dozens of machine makers, some companies recommended the heavy gear oils. That probably wasn't bad though many modern oils are thin synthetics. I use the more expensive stuff - a quart will change 2-4 machines, but I tend to put many miles on my rigs in sometimes hard conditions. I wouldn't worry if things were less severe. Perhaps the more important detail is to make sure that the oil stays clean, free of excess wear metals and moisture. Changing on a regular (yearly) basis is good preventative maintenance.
Formerly known as 63November, and before that as Golsovia.