Toro Brand synthetic oil for a very reasonable cost. $7.50 per quart. Any idea who makes it?
I will likely change the oil in my mower using their brand but was curious.
Toro, located in Minnesota, owns Exmark. Exmark has had their branded oil out for at least 5 years. In 2011, I determined that the Exmark oil was made by a Minnesota blender called Lubrication Technologies, which now seems to be called Lube Tech: http://www.lubetech.com/