John Slade <sladerj@bellsouth.net> wrote:

[ Lynn Hanover]:

Water temp 180 at cruise hot day climb 200. Oil temp 160 (ideal)
at cruise, 180 is OK, 210 hot day climb. Power goes down above 160 oil
temp.

I've told by another well respected rotary expert that the REW is designed
to run at 203 - 212F, that oil temp should be kept below 240F, and should
never regularly go over 248F. Everywhere I go I hear different numbers for
these limits. I'm using 5-30 Castrol Synthetic.

John,  One aspect of the disparity is the problem of where to
measure the oil temp.  Mazda does it at the oil pan.  I
believe that Lynn is doing it at an adapter block where
the oil returns from the cooler to the rear housing.  It's
going to be cooler there - and more relevant to the temp.
at the bearings. Dale R.