[AndyW]

Nevermind...found it on the other site..forgot some of the discussion there.

Pulled this interesting data from the log (removing idle time at start and finish)

% Time less than 40 psi 5%
Longest time less than 40 psi 4 Sec
% Time less than 60 psi 18%

These are very different than my numbers from last fall.

Low pressure points are definitely in the slowest left hand corner.

So, what is the concensus on need for a check valve?...I plan to tee in to the return line from my driver side oil cooler.