water soluble oil, for water/meth injection

Hey everyone,

As it starts getting warmer I'm going to hook up the Water/Methanol system on my Subaru WRX. Now a lot of people say its corrosive and I tend to agree.

I noticed all the old WWII mixtures had 1-2% water soluble oil in the mix, some people have said its to lube the pumps, some have said to inhibit corrosion. Anyway who makes a water soluble oil WITHOUT additives?

Thanks