If you run anything but pure methanol, you run the risk of prematurely hurting the pump.
This is real easy, you play chemist with the pump.. your results may vary. I dont want to hear ... "My pump failed"... after I told ya so.
The pump will not handle oil in any fashion. The diaphram will react by shrinking and next thing you know.. your leaking from the head... needing a new pump.
I'll use the milk jug analogy.. you cant put gasoline in a milk jug.. even tho its made of plastic.. and gas tanks are made of plastic.. you decide to do so, when the leak happens.. you were warned. Its a chemical pump, not an oil pump. Any oil... you'll see.
Contamination(oil/fuel) is the reason for the majority of every pump failure I have seen the last 4 years. Typically takes about a few weeks.. then the pump starts to leak.
HTH