I am wondering if this will work with such a slow rate of loss... when the car is fully warmed up and in Park/braked, if someone sits in the car and revs the engine a bit, can you smell burned oil in the exhaust?
If you cannot smell it, maybe your rate of loss is too slow for this to be useful. Or maybe as you suggest you have a minor leak somewhere. That can be a PIA that I know well, having spent considerable time and $$ with a Toyota engine that had multiple locations where it refused to block oil leakage. Good luck with this one.

 

Why haven't you had the valve seal TSB done? I also have a '21 2.5T and mine burns no oil (32k miles) at all so I wouldn't say yours is normal.

 

If oil is going into the exhaust system at some point the CAT is going to be damaged or destroyed.. The other thing is that the CAT operatives at temperatures that will flash carbonize or burn the oil so detecting it by smell even among experienced individuals is hard to detect. basically in most cases your are going to get a DTC relating to the emission system specifically effect the CAT before you are likely to smell the oil.

I did not verify the origin of the content, but I feel based on my level of certification that they are at least accurate if not fact or empirical information (unconfirmed).Fun facts:

The optimal operating temperature for most catalytic converters is between 400°C (752°F) and 800°C (1472°F)1. The pre-catalytic converter temperature should ideally be around 300°F, while the post-catalytic converter temperature is best at about 500°F

The normal operating temperature range for engine oil is typically between 175°F (80°C) and 225°F (107°C)45. However, the temperature can vary significantly based on the vehicle's design, engine type, and operating conditions1. Above 250°F (121°C), there is a risk of oil breakdown and engine damage

Motor oil carbonizes at temperatures above 250°F (121°C)1. This can lead to oil breakdown and engine damage


This is oil temperature NOT coolant temperature:
220°F – 250°F (105°C – 121°C) High Oil thins, potential loss of protection
Above 250°F (121°C) Overheated Risk of oil breakdown and engine damage

 

Interesting -All these replys and no info on the year / engine type / new or used ?
Im on my 3rd CX5 -not one has burned any noticeable level of oil -

 

You realize it is impossible for you to claim not burning any oil right?
It is still a DI (direct injected) engine and therefore some oil WILL via the PCV system get into the intake and thus into the combustion chambers and "BURN" lol
If you don't think this is true pull your TB a scope the complete inside of your intake manifold and post it up!

 

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Thank you....I misread the manual I believe it is recommended same for US and Canada...Do most find them 0w-20 good for the car..Have seen other comment that it shows more wear? Could be due to longer intervals between oil changes or do others here feel 5w-30 would be better choice? Weather wise range is fine for both oils 5w30 seems to match better....I noticed you mention get it tested as well...Anyone recommend a certain brand of oil?

 

You have to consider the source. How did they come to the conclusion? How many oil analysis did they have to support their theory? Then there is the state of health of the engine and vehcle itself. Not to mention the service history?
So basically BS...
Evetime someone made a comment about other oil viscosity on this forum in the last 5 almost 6 years I would run that viscosity on my Mazda for the usual for my between oil and filter changes. As well have several oil analysis to show the oils health. While I did see some difference in MPH there was no indication of any premature or wear. It all on my thread.

I use: (not in any order)
Redline
AMZOIL
Pennzoil
Castrol
Monil 1
Even Safeway Signature at times depending on who the bottling distributor is.

Oil Analysis | Blackstone Laboratories

 

It appears to OP has not provided any info other than the inital supposition that thier cx5 of unknown , year, mileage , engine type - , history ---appears to be a new poster trying to create doubt about these vehices -regardless I will restate of my 3 CX5 NAs- none have revealed a noticeable loss of oil between oil changes- Thus they have operated with minimal to negligable oil loss - based on my INTERMITTNT viewing of the dip stick between oil changes -- extremely well engineered power plants that shame the current competition- I ve always been good with 1/2 on the stick - you ask 10 people you get 10 different answers -- Sometimes from the same person ;-))Use common sense - ZM-ZM

 

I think he is speaking of the dip stick (as I did). In my experience, with 5k oil changes on my '19 2.5 I saw no drop in the oil level on the dipstick between changes at any time over 20k miles. Same for my '21 2.5T after 32k miles. I have never had to add any oil between oil changes.

 

You would not unless u had an absolute way to measure small oil loss. My point is a DI engine will by its design will have oil in the intake which will get into the combustion chambers. But I also suggested that that amount is so small unless you scoped both the intake and combustion chambers you would likely never be able to measure the amount of oil loss through the pct system .

I might also add that oil and filter changes the exact mount if you could or did measure it is different every time. If for even but a once difference. Not having anything to do with burning oil . If you think about it I am sure at least you know why.