Cheers for the sites nuts. Its not so much for the upper hand - just if the engine goes well I'd like to see what could be done with race fuel in it. For topspeed stuff it could also be used for added safety as its hopefully made to tighter tolerances - as I'm always scared of a bad batch.
Especially after stories from friends about super tanks getting filled with NUL from time to time or always in some cases!!!! Not a good chance to take at the limit!
Martin