MW50 -Secondary effects were cooling of the engine .

[WTE_Galway]

Originally Posted by Letum

I think this is wrong.
My understanding is that it's the methanol that causes the engine to run cooler, not the water. The water is just there to prevent the methanol from causing premature detonation.

edit: Looks like I'm wrong.

Neither will cause the engine itself to run cooler.

The fuel air mix is cooler meaning combustion is cooler and thus detonation is avoided.

Any engine cooling would be negligible, people are just confused.