I did look at both those site prior to asking,
re #1, they state the minimum thickness increases with surface speed, and decreases with load. My point here is that load increases in an engine with rpm as well, having to accelerate the pistons and overcome internal resistance. At lower RPMs the engine might not be making that much torque even.
re: #2, they did mention using an external oil pressure source to center the journals. Might be nice to have a valve and an accumulator for worrysome hypermilers to use just prior to restart
