I watched Horsepower TV today and the topic was alcohol motors, which i know little about.
So i guess alcohol has no smell to it nor lubricating properties, so a bottle of top end lube is added to the drum of alcohol. u can get different scents of top end lube so u know u are messing with alcohol and not water.

Scents include:
Blueberry, banana, fruit punch, pina colada, strawberry, ect.

weird but very interesting.

Really, fruit smells? I know when I mix race gas I add some mineral spirits and trans fluid to it.