eot vary more on bpd kits its normal. air flow has a lot to do with it. You really cant use standard temp differentials sense it not using an oil to water heat exchanger. 6.0/6.4 have major issues with the cooler pugging quick test for that is compare temps. bpd has two separate cooling systems= different temps. iirc bpd has 2 different size ota coolers standard and hd they also have cold climate package "aka thermostat " they also have adapter to use different fan for more airflow. as long as oil isn't getting too hot i personally would not worry about it.
