Have any of you regular chainsaw users tried a chain oil by Oregon called Arborol ultimate? Sadly, the best garden machinery/garden centre up here closed down recently and were selling off their stuff very cheaply. Bought a litre of this lube, which is biodegradable and can be mixed 1:4 with water. But, they say to use diluted lube within a day and to discard any after this time. Question is, should this include any left in the saw? I'm assuming it does, but how rigorous should you be about this?