OBD2 Scanner/App: what sensors/values to monitor?

[SparkYellow]

Today the temp peaked at 226 on my way back. Yesterday it went up to 222 on the way over. Same route, similar traffic condition. MPG is down to below 35 which is the normal average.

 

[Speed3.5]

What’s the coolant temp in relation to the engine oil temps ?

 

[SparkYellow]

What’s the coolant temp in relation to the engine oil temps ?

It goes up when in traffic but otherwise stays below 200 when the oil temp hikes.

The first chart is from yesterday afternoon, one hour trip back from one job. The flat line is because I forgot to disconnect and it kept logging.

The second one is this morning, half hour trip to another.

Have you ever cut open your SuperTech filters? I saw a video and it looks like it has a center tube with the largest openings for filtered oil to come through. Most filters designed for longer OCI have center tubes with small cuts/holes.

 

[sinistriel@]

Something to keep in mind on engine oil temps. The 2.5 turbos have an actual oil temperature sensor, most of the NA models do not and it is a calculated temperature based on engine coolant and vehicle load.

 

[SparkYellow]

Something to keep in mind on engine oil temps. The 2.5 turbos have an actual oil temperature sensor, most of the NA models do not and it is a calculated temperature based on engine coolant and vehicle load.

Thank you! I didn't know that. Was surprised that I could even get the ATF temp on a CX-3 mid trim. Even if it is a calculated number, it is the only number I can go by.

I will make a chart later for engine load, coolant temp, and oil temp from the log.

 

[sinistriel@]

Thank you! I didn't know that. Was surprised that I could even get the ATF temp on a CX-3 mid trim. Even if it is a calculated number, it is the only number I can go by.

I will make a chart later for engine load, coolant temp, and oil temp from the log.

ATF temp is real in any Skyactiv and measured in the pan.

 

[SparkYellow]

ATF temp is real in any Skyactiv and measured in the pan.

Thank you! I didn't look for the sensor though when I had the pan off. Is it on the side or at the bottom?

 

[SparkYellow]

I tried two phones (different Android versions). While the calculated engine load is monitored, it is not always an option to choose from the log. The drive this morning didn't include the engine load as an option so I used vehicle speed.

An earlier log did include the option but the info doesn't seem to be right.

Either way, the dip in the record is concerning. Not sure if the BT lost connection temporarily or the sensor lost power.

 

[Speed3.5]

I tried two phones (different Android versions). While the calculated engine load is monitored, it is not always an option to choose from the log. The drive this morning didn't include the engine load as an option so I used vehicle speed.

An earlier log did include the option but the info doesn't seem to be right.

Either way, the dip in the record is concerning. Not sure if the BT lost connection temporarily or the sensor lost power.

For reference the coolant is the fluid that regulates the excess heat of the engine which would in most cases average around180F.

Check what’s the condition of the cooling system of your car bc oil is meant to lubricate and handle the temperate range where as coolant is to regulate the excess heat (above 180F).

 

[N7turbo]

It may open around 180°, but the car is not trying to maintain 180°. Its optimal target is between 200-210° F.

 

[SparkYellow]

For reference the coolant is the fluid that regulates the excess heat of the engine which would in most cases average around180F.

Check what’s the condition of the cooling system of your car bc oil is meant to lubricate and handle the temperate range where as coolant is to regulate the excess heat (above 180F).

The coolant temp has been around 194 for as long as I can remember. Coming from a MINI that suffered an overheating episode, this is the only temp that I was watching on the CX. It stays constant after 8 years and 150K+ miles. There was no leak and I still have more than 3/4 of the OEM jug from 2017 after occasional top-off. I thought maybe this is the one thing that was indeed life-time quality.

The first coolant drain/fill was this July after the second drain/fill of the ATF. The old fluid was clear though the color has faded. Let me think what else it could be...

 

[SparkYellow]

Found a pic from 2019 when it was 2.5 years in. That is the running temp that I remember.

 

[sinistriel@]

Thank you! I didn't look for the sensor though when I had the pan off. Is it on the side or at the bottom?

 

[Speed3.5]

The coolant temp has been around 194 for as long as I can remember. Coming from a MINI that suffered an overheating episode, this is the only temp that I was watching on the CX. It stays constant after 8 years and 150K+ miles. There was no leak and I still have more than 3/4 of the OEM jug from 2017 after occasional top-off. I thought maybe this is the one thing that was indeed life-time quality.

The first coolant drain/fill was this July after the second drain/fill of the ATF. The old fluid was clear though the color has faded. Let me think what else it could be...

You’ve never changed the thermostat or the water pump ?

 

[SparkYellow]

You’ve never changed the thermostat or the water pump ?

No. Let me look it up.