Mogas: what happens to EGTs?

This was a little fun quiz that was circulated on a type specific
email list a few days ago. It was authored by George Braly of
Advanced Pilot Seminars, and principle of GAMI. If you're familiar
with George, you know he backs everything up with HARD DATA obtained
from his own research. In a couple of days I'll post the correct
answers (no, I didn't get them all) so that most can learn and a few
can refute. Have fun.

Ok... little MOGAS quiz for you.

You run the Left tank dry and fill it up with premium unleaded car
gas.

Right tank has 100LL.

Takeoff on the RH tank and climb, level off, and set up the mixture
for
cruise flight. Either ROP or LOP. Your choice.


THEN, you switch to the LEFT tank. You change nothing else.

Later you download your JPI and plot the data.

1 What is it going to show happened to the EGTs when you switched
tanks?

2 What is it going to show happened to the CHTS when you switched
tanks?

3 (not in the JPI, but: ) What is the airspeed going to do? Increase?
Decrease? Stay the same?

Why?