ISX OIL COOLERS

[schISM]

So after I watched the oil system video I was like "OK, no thermostat equals hotter oil, ya gotta have it". But it just didn't make sense, how does a thermostat keep your oil cooler? Well according to the video it allows the oil to bypass the coolers when the oil is cold and redirects the warm oil through the cooler as the oil "warms up". Therein lies the misconception. Cummins is saying the "cold oil" bypasses the cooler. OK, we know that the thermostat doesn't open until the oil reaches 235 degrees fahrenheit. So according to Cummins any oil less than 235 degrees is "cold". I've never seen my oil temp. over 225 degrees so one could reason I've never utilized my oil cooler.
Now what's gonna happen if I take a thermostat that as far as I can tell has never opened out of an oil passage that is now wide open to the oil filter but also to an oil cooler? Physics will dictate that the oil takes the path of least resistance which at first glance is obviously the wide open port directly to the filter, certainly not through a restrictive oil cooler. But wait, the oil cooler and the bypass port joins together just before the filter and because of that there can't be delta pressure in the oil gallery. Now the volume of flow through the cooler will be less than the bypass port in theory but nonetheless there will be flow through the cooler resulting in lower oil temps......I THINK. I've never tried this so I couldn't say for sure.