Scottoiler oil

[stevierst]

Just as a point of information here:
Scottoil is water soluble but engine oil and chainsaw oil are not. It wears off the tyres faster than engine or chainsaw oil if it gets onto them. The thin oil allows it to penentrate the chain more easily. I would be sure the Scottoil company would have researched this well and the brand they created was in line with safety of the motorcyclist.
Used engine oil is the wordst possible thing to use. The characteristic of engine oil change dramatically when used in a combustion engine and it as the more it is used the more acidic it becomes.
I would not think acid based oil would be a good lubricant for a motorcycle chain

I used to use old engine oil, but it makes the back wheel mingin really quickly, and I stopped doing it. I use new engine oil, and have done for the last few 100's of thousand miles I've ridden. I rarely have to adjust my chain, let alone replace it. And I never have to clean it, the oil does that for me. You need double the ammount of Scottoil to do that at one hell of a cost, but I do like a wet chain. Just my opinion