Just finished a holiday road trip (~700 miles one way) in my 2023 Mazda CX-50 2.5S. Heading back home on Sunday with my OBD MX+ plugged in, I’m able to monitor all sorts of different parameters on my Mazda including actual engine oil temperature, not just the estimated oil temp. While I don’t know which sensor the data is coming from as Mazda has two oil temperature sensors, one in the ultrasonic oil level monitor and the other is the combination oil pressure/temperature sensor, either way its the actual temperature.
The ambient temperatures started out in the low 30s and only got colder as we traveled North away from the coast and into Appalachian Mountains. For first hour to 90 mins of the drive, the front shutter flaps remained closed and the oil temperature got pretty close to the coolant temp of ~180 degrees, but as soon as the flaps opened up, the engine oil temperature started dropping and dropped all the way down to the high 140s and low 150s when driving on flat roads. Once driving in the mountains, the oil temp crept up, the highest I think it reached with the front shutter flaps opened was mid to high 170s while climbing a long steep grade, but would come back down and settle in the low to mid 160s while not climbing super long and steep grades. This observation has made me curious about the control logic for the shutter flaps, cause once they opened, they never shut again while driving. I figured they would shut while heading down the mountains but they didn’t. This has me thinking this engine might benefit from an engine oil to coolant heat exchanger during the winter months, as one isn’t include.
Just thought this would be interesting to share and was also curious if anyone with the Mazda 2.5T engine monitors their oil temps since that engine has an engine oil heat exchanger included.
The ambient temperatures started out in the low 30s and only got colder as we traveled North away from the coast and into Appalachian Mountains. For first hour to 90 mins of the drive, the front shutter flaps remained closed and the oil temperature got pretty close to the coolant temp of ~180 degrees, but as soon as the flaps opened up, the engine oil temperature started dropping and dropped all the way down to the high 140s and low 150s when driving on flat roads. Once driving in the mountains, the oil temp crept up, the highest I think it reached with the front shutter flaps opened was mid to high 170s while climbing a long steep grade, but would come back down and settle in the low to mid 160s while not climbing super long and steep grades. This observation has made me curious about the control logic for the shutter flaps, cause once they opened, they never shut again while driving. I figured they would shut while heading down the mountains but they didn’t. This has me thinking this engine might benefit from an engine oil to coolant heat exchanger during the winter months, as one isn’t include.
Just thought this would be interesting to share and was also curious if anyone with the Mazda 2.5T engine monitors their oil temps since that engine has an engine oil heat exchanger included.