2018 to 2023 CX-5 2.5 NA Owners with high mileage. How is your car doing?

[190018]

I stumbled across a review from cararac.com (Mazda Cylinder Deactivation Problem – Reasons and Ways to Cope With).

In the review, there was one particular paragraph mentioned by the author stating that the owners of 2.5 NA with cylinder deactivation, are feeling that their mazda vehicles are having excessive oil consumption, typically starting from 30,000 miles.

I don't see any source mentioned by the author or whether he or his publication conducted a focus group on it.

So I thought of starting a discussion to check on the 2.5 NA (2018 and up) high mileage owners, on how their cars are doing. Are you observing any excessive oil consumption?

NOTE: This is NOT for the 2.5 Turbo owners, who have an existing TSB of excessive oil consumption (DTC P250F:00 - Engine oil level signal: engine oil level low)

 

[sm1ke]

Please refer to this existing thread. It's not specific to oil consumption, but any reports would ideally pop up in there.

NA CX-5 with Cylinder Deactivation Engine Repairs - Report In

There has been a lot of discussion of turbo oil consumption and some reports of lost compression with possible causes being cracked cylinder heads or manifolds or valve stem seal failures. How about the non-turbos with cylinder deactivation? I can't recall seeing such reports. Report in--the...

mazdas247.com

 

[edmaz]

What this guy wrote is IMO rambling, disjointed, and is obviously lacking in anything resembling proof of his CD oil consumption claim (and much of the other stuff as well). Some of us here have multiple significant concerns related to our Mazda CD engines, however I've seen VERY little being written by owners about CD oil consumption.

In my own case, we have 2 of them in the family, one at 59K miles and the other at 40K, and neither one of them has any detectable oil consumption whatsoever, with 5K OCIs. Although I typically save much of what I read, what this guy wrote is definitely not going to be one of them.

 

[cz5gt]

fun stories all over the Internet.

 

[erhayes]

Troll ?

 

[german88]

What this guy wrote is IMO rambling, disjointed, and is obviously lacking in anything resembling proof of his CD oil consumption claim (and much of the other stuff as well). Some of us here have multiple significant concerns related to our Mazda CD engines, however I've seen VERY little being written by owners about CD oil consumption.

In my own case, we have 2 of them in the family, one at 59K miles and the other at 40K, and neither one of them has any detectable oil consumption whatsoever, with 5K OCIs. Although I typically save much of what I read, what this guy wrote is definitely not going to be one of them.

Couldn't agree more. I found two sentences in the entire article that came close to the issue of "oil consumption" but failed to directly explain it. I've highlighted those 2 sentences and more importantly 3 words in bold which address it directly below in quotes. Most if not all auto manufactures have gone to low tension rings in an effort to meet ever increasing NHTSA fuel efficiency standards. While this does help with efficiency it does so with increased risk of oil consumption. Oil simply has an easier path to bypass the rings and inter the combustion chamber as the ring lands become contaminated with carbon deposits with age and normal wear this problem goes up exponentially. Best way to deal with it is simple. 5K OCI with good oil! You've obviously figured this out already...

"The fact that piston rings require both combustion and compression pressure to function was one issue that was addressed. This is because rings' spring tension is insufficient to push them firmly against the cylinder walls to create and maintain a positive seal between their sealing surfaces and the walls."

 

[azcx5]

So i have recently had the dreaded oil consumption issue. 2021 CX-5 Turbo (GTR) with 27,000 miles. All of my oil changes have been on 6-month intervals and between 3-6k miles, below the 7.5k advice from the service manual. Took it to the dealer and told them about the TSB. They said they recently had one other car in for the same issue. They then changed the oil to get a baseline they like on the oil level. Said to drive it 1000 miles and check the oil. When i checked, it was a 1/2 qt low. Dropped it off Monday for them to start the diagnostic process with Mazda. Now waiting for a status call-back.

I will also mention the TSB on cracked cylinder head in case there an issue start there.

 

[Chocolate]

So i have recently had the dreaded oil consumption issue. 2021 CX-5 Turbo (GTR) with 27,000 miles. All of my oil changes have been on 6-month intervals and between 3-6k miles, below the 7.5k advice from the service manual. Took it to the dealer and told them about the TSB. They said they recently had one other car in for the same issue. They then changed the oil to get a baseline they like on the oil level. Said to drive it 1000 miles and check the oil. When i checked, it was a 1/2 qt low. Dropped it off Monday for them to start the diagnostic process with Mazda. Now waiting for a status call-back.

I will also mention the TSB on cracked cylinder head in case there an issue start there.

Unfortunately the '21 MY turbo models have a high rate of oil consumption; some manufacturing defect occurred during that year's model production because it doesn't seem nearly as prevalent in all the other model years.

NHTSA CX-5 Issues List

Compare by year. https://www.nhtsa.gov/vehicle/2013/MAZDA/CX-5/SUV/AWD https://www.nhtsa.gov/vehicle/2014/MAZDA/CX-5/SUV/AWD https://www.nhtsa.gov/vehicle/2015/MAZDA/CX-5/SUV/AWD 2016 model year includes most of two years, 2016 and 2016.5 model years...

mazdas247.com

 

[azcx5]

Last Aug (2023) I posted that I had recently had the dreaded oil consumption issue. 2021 CX-5 Turbo (GTR) with 27,000 miles. All of my oil changes have been on 6-month intervals and between 3-6k miles, below the 7.5k advice from the service manual. Took it to the dealer and told them about the valve guide TSB. They then changed the oil to get a baseline on the oil level and consumption. Said to drive it 1000 miles and check the oil. When i checked, it was a 1/2 qt low. Brought it back for them to start the diagnostic process with Mazda. Now waiting for a status call-back. BTW, the VIN is in the range covered by the TSB.

Update: At that time the dealer advised me that Mazda would not be able to take any action as the "check oil" light was not on and i had to bring the car back when the light was on. A few months later the light came back on but as i was in the Phoenix valley with a long hot upgrade drive home i added oil. Reported the issue to the dealer to put in my service records. No problems for a while. Dealer changed the oil on Mar 7 at 37k miles. Now at 41k miles.. Last week i was driving back home from Phoenix when the check oil light came on. I called the dealer to report and advised that i was going to add enough oil for the light to go off as i didn't want to drive with the oil light on. Took the car to the dealer last Thursday to check. They called today and told me that Mazda was going to follow the TSB and replace the valve guide under warranty.

So maybe the issue will be taken care of.

 

[yrwei52]

Last Aug (2023) I posted that I had recently had the dreaded oil consumption issue. 2021 CX-5 Turbo (GTR) with 27,000 miles. All of my oil changes have been on 6-month intervals and between 3-6k miles, below the 7.5k advice from the service manual. Took it to the dealer and told them about the valve guide TSB. They then changed the oil to get a baseline on the oil level and consumption. Said to drive it 1000 miles and check the oil. When i checked, it was a 1/2 qt low. Brought it back for them to start the diagnostic process with Mazda. Now waiting for a status call-back. BTW, the VIN is in the range covered by the TSB.

Update: At that time the dealer advised me that Mazda would not be able to take any action as the "check oil" light was not on and i had to bring the car back when the light was on. A few months later the light came back on but as i was in the Phoenix valley with a long hot upgrade drive home i added oil. Reported the issue to the dealer to put in my service records. No problems for a while. Dealer changed the oil on Mar 7 at 37k miles. Now at 41k miles.. Last week i was driving back home from Phoenix when the check oil light came on. I called the dealer to report and advised that i was going to add enough oil for the light to go off as i didn't want to drive with the oil light on. Took the car to the dealer last Thursday to check. They called today and told me that Mazda was going to follow the TSB and replace the valve guide under warranty.

So maybe the issue will be taken care of.

The oil consumption issue in this thread is for 2.5L NA with CD. You have a 2.5T turbo, you should post your report here:

Mazda CX-5 (and other models) Oil Consumption TSB (WTF)

Mazda Oil Consumption TSB Turbo Engines
Components: ENGINE AND ENGINE COOLING, TIRES, ELECTRICAL SYSTEM
NHTSA ID Number: 10202685
Manufacturer Communication Number: 01-012-21-3832

5 Affected Products
Vehicles
MAKE MODEL YEAR
MAZDA CX-30 2021
MAZDA CX-5 2021
MAZDA CX-9 2021
MAZDA MAZDA3 2021
MAZDA MAZDA6 2021

Summary
Some vehicles may have a LOW ENGINE OIL LEVEL warning message and a CHECK ENGINE light illuminated in the instrument cluster, along with DTC P250F:00 stored in memory. DTC P250F:00 - Engine oil level signal: engine oil level low. Upon inspecting the engine oil level, the level is found to be low and there doesn't appear to be any trace of oil leakage in the engine compartment. This concern usually occurs when the mileage reaches approximately 3,100 - 4,700 miles (5,000 - 7,500km) and may also occur again after replacing or topping off the engine oil. The root cause of this concern has not been identified yet, therefore a repair procedure will be announced at a later date. Since this issue has been reported after a valve stem seal modification, it is very likely that valve stem seal damage is causing oil to leak into the combustion chamber.