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Graham Parker

In case anyone was considering this, I contacted the makers today and they were clear that it is ok for general vintage use, BUT NOT OK for thermo / syphon systems, and thus not compatible for use in a SCOTT – apparently its to do with the thermo-fluid dynamics of the coolant, which would cause overheating around the barrel before the syphoning action would commence.

Given that I’m going to use Morris Lubricant’s “universal anti-freeze” which they recommend as being ok.