a few pointers.
millers reckon that their 10/60 fully synthetic can run at 120 degrees safely, and can peak at 150 occationally.
I ran with no oil stat and an oil cooler, as recomended by SBD. It cost me all my bearings and a crank regrind.
oil water intercoolers cost about 100-150 from think automotive.
I aim for 100+ degrees for my oil but never see it, but then again, i have a different set of problems to you guys.