Mixing my own WM50 - questions....

[rotrex]

The main issue is that the density of Methanol is only 80% of that of water.
To get to the recommended 50:50 mix, you need to mix 1kg of methanol with 1kg of water or 1 gallon of methanol to 0.8 gallons of water or 5 gallons of methanol to 4 gallons of water.