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I think the confusion arises due to the fact that the LT6 reports the temperature for the oil in the tank NOT the temp coming out of the engine, which is plenty hot. That's a change from the way temps were previously reported. For tracking, the important oil temp is the temp of oil going into the engine, not the temp exiting the engine.
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I think the confusion arises due to the fact that the LT6 reports the temperature for the oil in the tank NOT the temp coming out of the engine, which is plenty hot. That's a change from the way temps were previously reported. For tracking, the important oil temp is the temp of oil going into the engine, not the temp exiting the engine.
This piece combined with the fact the engine has a dry sump pulling some vacuum on the crank case which lowers the boiling point of water by a good bit. GM states it can hit 80 kPa at high rpm or around 11 psi of vacuum. While it's certainly less at cruising rpm, there would still be some vacuum in the crank case. If you use the redline pressure in the engine of roughly 4 psi absolute that puts waters boiling temp just above 150 degrees F. So once you take into account the oil is measured in the tank, the vacuum in the crank case, etc, it's pretty easy to see all the old school stuff can be thrown out the window and just drive the car.
For clarification and understanding, engine oil is pulled from the tank to the pump, then pushed through the oil cooler, then the oil filter where it exits the filter and enters the main oil gallery in the block. The oil temp sensor (21) is positioned in the oil filter housing and measures oil temp as it exits the filter before entering the main oil gallery.
The oil cooler is an oil to water heat exchanger. A portion of the return coolant flow from the front radiators is split off to the auxiliary radiator inside the duct just forward of the driver's side wheel. This coolant is further cooled and then delivered to the engine oil cooler. This coolant then exits the oil cooler and combines with the main return coolant flow from the front radiators.
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