[wernergmhtp]

Originally Posted by hcsi99

I run a stand alone oil temp sensor with a digital gauge and have seen temps at 305 on a stock LS3 running a small cooler. After adding a 2nd cooler I didn't see temps above 285. I don't know how accurate an external engine block oil drain plug temp would be in relation to the actual oil temp, and from what the article states and show that's where they took their readings from.

hcsi99, where exactly is your oil temp sensor located?

I'm not sure there is a way to measure "actual oil temp" because clearly, not all 8 qts are at the same temperature at the same time. Of course the temperature in the main oil gallery will be different from the temperature of the oil sitting on top of the heads, which will also be different from the temp of the oil in the pan. Is it the maximum temperature that matters? The amount of time spent at max temp vs. minimum temp?

I'm certainly not saying a given method of measurement is wrong. I'm just saying that clearly, GM Powertrain engineers thought about some of these questions before sending GRM one of their own oil drain plug thermocouples that they use in their own testing.