From and old post by mossie I find that the use of methylated spirits were used in Rotary-Radials to allow the Castor Oil to flow for fast warm -ups. Since in an engine as the Hispano-Suiza the addition of this to the Castor Oil would allow the lubricant to also flow better, from a cold start, I am wondering if anyone has found that denatured alcohol, a methylated spirit, to be used in any regular piston engine such as the Hispano-Suiza?
Just how many aircraft engines were treated with gasoline in WW-2 in a similar way is unknown but we do know it was done and I believe it was even in the engine manuals and just how and when and the restrictions that applied to it.
http://physics.slss.ie/downloads/ph_...tedspirits.pdf
Yours, M.L. Anderson