So, engine ice and evans goes in the bike, what's the difference? Anything that gets on the track whether it be oil, antifreeze, water or last nights dinner is going to be slippery. The big disadvantage with anti-freeze is that it's very hard to clean up and that's the primary reason it's illegal. I am not sure if engine ice or evans is more slick than water but since they are deemed legal I'm sure that they are easily cleaned up should a spill occur.