I just run water right out of the tap...but since it's gonna be real cold here real soon, I'll switch to automotive based 50/50 antifreeze/coolant and water mix so my shit don't freeze up and crack...
I understand the long term effects on a car, but I don't think anyone puts 100,000 miles on their banshee...either.
Boy...I sure would love to try...though...
Now I know what you're thinking...I run alcohol which burns colder, and I only drag race.
But...
In my 4 mil cub last year, with a LOT of compression and timing and on race fuel, I ran straight water in the system and I'd beat on it for a while in the dunes, NOT just drag race it.