With the temp probe mounted in the oil cooler, in the port that is in front of the oil filter out at a angle.
OAT's around 75*
With a 4094avnt, emty 180*, with a large trailer 200*
OAT's 100* with a large trailer 240* and as high as 260*
OAT's around 75*
With a 4094avnt and S475, emty 190*...