Excellent work! FINALLY we get some empirical data on this topic.
At home I use kerosene to clean the chain and then a good lube (Bel-Ray Super Clean or the Dupont stuff usually). On the road I substitute kerosene with WD-40. I figure that it's ok once in a while and the WD-40 comes in handy for lots of other uses too.
Long-term testing with some heat applied would be especially interesting.