I Run Vp M1 Methanol and I purge with the vp 50:1 already mixed fuel that you can get from any hardware store, home depot, lowes or any small engine shop. Its already mixed and its high octane.
Pour it in start it up run until it barely can run. Purge complete....
http://www.homedepot.com/p/Unbranded-VP-Small-Engine-Fuel-50-1-Pre-Mixed-94-Octane-Ethanol-Free-Single-6235/203526823