Very nice.(Oh, come on Spiff, that's SUCH a lame-o comment!)
Very cool looking. It appears to be shaking at a high RPM with awesome lighting bolts coming out of it. (Have you had the plug wires checked for arcing recently?)
Well done! Now this is a great idea, and fits the theme comfortably, but with a little room left for the "messy" aspect, which is what makes this challenge so difficult to score. Definitely above average in this challenge! Call me engaged, too!
More "unintended" consequence would have sold me on the messy aspect, however, so I'm not awarding points for creativity on what is otherwise another simple abstract of light in this challenge. An element of the unpredictable would have added to this.
Your use of engine vibration to distort and move light gives this slight seperation from the more common abstracts though.