Make sure you document this with the dealer. The low oil warning could possibly be more related to the oil pump than the oil level. There have been oil pump failures in the past.

 

Does the 2.5t have oil consumption problems on the other models also? I didn't know the 2.5t even had consumption issues

 

Its not a common issue with this engine. 1st time I have seen someone post about oil consumption... My 2.5T and many others do not have oil consumption that is noticeable between oil changes. Most of them seeing redline everyday as well.

 

2.5T here with first Oil Level Low warning. Added a quart of different synthetic while on a trip to the beach. I'm close to 5000 miles since last change. Had to mix Mobile 1 with the Liqui Molly, so oil change this week. What's the Turbo viscosity again? I have 0W20 in there now, but figured that might be better in the hot NC summer.

Anyone have a performance oil brand or viscosity suggestion for hot climates?

 

if your running 0w-20 the oil is too thin and most likely why your seeing the oil level warning, the oil pressure is too low and oil consumption up from the oil thinning out.... Since the car is turbocharged it needs to run the *w-30 weight oil.. the 30 weight is very important for the turbocharger and engine design with the amount of heat output from the turbo when at any boost level and the oil is at temp..... 20 is too thin.. If you want the cold 0w rating use 0w-30

I also had a friend with the turbo 3 get the same message "Oil level Low" his oil was at the correct level.. What happened was his Mazda dealer put 0w-20 in by mistake two days before when he had his 1st oil change he noticed on his bill.. So he went back they changed to 5w-30 for free.. no more Oil Level errors as well. Thankfully I do my own oil changes.

But good to know the ECU picks this up early.


Pic from 2021 Turbo 3 Canada/USA manual below.

 

I am running 5W-30 mobil1 and at 3600 miles since last change - no noticeable drop in level

 

Just changed over today, so we'll see if it comes up again before my next change, but I suspect @Tric is correct that you don't want to question that particular requirement of using 5W-30 on the Turbo to avoid that error message and having to add a quart of oil.

 

I should have added this is in a hotter than normal Chicago area summer

 

I think US is 0W20? It says 5W30 under 2.5T hood, so I guess you're right.

Engine oil specification

Item​	U.S.A. and CANADA​	Except U.S.A. and CANADA​
Engine oil grade​
ILSAC GF-V or higher​	API SM or higher, or ILSAC GF-IV or higher (Mexico)​
Engine oil viscosity​	0W-20​	SAE 5W-30 (If SAE 5W-30 engine oil is not available, use SAE 5W-20 engine oil.)​

 

Mazda did something with their system with the 2021 model. I have had two Mazda CX-9's with the 2.5T. A 2018 and now a 2021. I do generally check oil levels just because. The 2018 would always get to a level between the two dots - but slightly on the lower end at close to 4K miles. Nothing would change and an oil change at 5K would not reveal anything different. With the 2021, I have noticed that when the exact same thing happens, the low engine oil light comes on. Alarming but very similar in aboslute level as before. I still usually add a quart at this point - just to make the light go away.

 

@scmazda3 you are right indeed that they did something with 2021 model; in this post, a TSB was attached describing the oil consumption issue that they suspect it's due to valve stem seal modification and it's applicable to 2021 model year.
From the looks of it (my personal opinion) is that they are either going to change the valves under warranty or entire new head.

It might be a good idea to report this to the dealer so it's recorded in their system and when a fix would be available, to benefit from it.
Seems this will be covered by the power train warranty which is 5 yr/60,000miles.

 

I didn't realize how much they had to change to the 2.5T to get it to fit in the 3. While this particular issue is related to the valve stem seals, other things were changed as well that I wasn't aware of until I saw the video with Coleman. Historically the 2.5 NA and 2.0 have been great engines not known to consume oil. Hopefully the issue gets resolved. I just made the cutoff.....403855.

 

I didn't realize how much they had to change to the 2.5T to get it to fit in the 3. While this particular issue is related to the valve stem seals, other things were changed as well that I wasn't aware of until I saw the video with Coleman. Historically the 2.5 NA and 2.0 have been great engines not known to consume oil. Hopefully the issue gets resolved. I just made the cutoff.....403855.

What video?

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The 2021 Mazda 3 Turbo: Not a MazdaSpeed3 & Dave Coleman of Mazda explains why! - YouTube

Changes weren't too drastic.

 

Got 1st low oil warning at ~15K, 300 mile over service period. Appt on this coming Wednesday morning. Needed to add a Qt as it was below bottom dot on stick. I will inform dealer to document.
Used -30W Valvoline Synth to top off. I hope this isn't a thing. My 05 RSX S was an oil pig 2-3 QTs every 7K oil change period based on how much VTECing I did.

 

Does your car fall within the VIN listing for the oil burn TSB problem?
Also did it log the low oil warning in the Mazda app?

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Apparently so! Just check my VIN on the Android app. I filed it last night, so the health check says normal. My RSX S drove me crazy. The joke at the dealer was, "just change the filter, I already changed the oil!" Honda's are oil pigs. My 16 Maxima never burned a drop, even under spirited driving. I guess back to checking it every week and topping it off until they get accountable.
I printed the TSB and plan on handing it to the Service and General MGR of the dealership.

 

I've never had to add oil to my 2019 2.5. EVER.

 

I've never had to add oil to my 2019 2.5. EVER.

Your car is not affected by what we are taking about. It's the Turbo engine.

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I had the dealer document it and will see what happens. As I posted further back, my 05 RSX S used 2-3 Qt per 7500miles. Normal by Honda Corp. specs.
I'll top it off as it get to 1/2 way on the stick. I hadn't been checking it, as the dealer told me these engines don't consume oil. That was my 1st mistake, trusting the Srvc. MGR when his lips were moving. 🥴

 

Yes I know this thread hasn’t been responded to in a while but it’s for logging any information for a future owner correct?
My car recently give the low oil warning although the oil level is only about 1/8 inch (approximately 3 mm) from the full hole on the dipstick, so it’s well within the operating rage, the mileage is presently 27,739 and I do 5,000 oil changes and 25,000ish was the last oil change.

 

Hello, I've recently been made aware of an oil consumption issue with 2021 Mazda3 turbos. I've been suspicious ever since I bought it last year and I noticed black soot along the edge of the exhaust and wondering if she was burning a bit. Doesn't seem too bad at least, she runs good and strong and averaging 30.6 per gallon to boot! Anyhow, I do have a question.....if I need to add oil at any point, what brand of synthetic mixes well with the Mazda factory oil? Was worried I'd screw the car up if I picked the wrong brand. Thank you

 

Oil is oil....just use whatever your owners manual says to use.

 

Thanks, sorry for the silly question.

 

Seems that Mazda published the previously mentioned fix, a few days ago, TSB 01-11/22, you should be able to see at your dealer.

 

Removed

 

as noted in the recent Oct TSB above, there is a major change in the vehicles affected - more vehicles added (inc some 22s) and VIN range change for vehicles on the earlier TSB list. Example, it looks like all Canadian AEs over all models have been removed.

 

I had this problem just once in July of 2021 and never since (3 oil changes later). My VIN falls in the range, but it seems the TSB does not apply if symptoms of the issue are not present. Did I read that right?

 

That would be my understanding; typically when they list a VIN range, it doesn't necessarily follow that all vehicles in that range have the issue. However, since you had the problem once, do keep an eye on the oil level before taking it in for each service; just in case.

BTW, is yours a 100AE? I thought they were all built before Oct 20. What was your build month? With one end date of Sep 21 for the Japan 3 VIN range, it sounds like all MY21 3T's built in Japan after mid Oct 20 and all MY21 and 22 3T's built in Mexico after Dec 20 have this potential issue,

 

I have a 2022 Japan build with a 11/21 build date but I also showed low oil, and oil was below the dipstick. Added 1.5 quarts to get it to mid level. Anyone else with a 2022 Japan built Mazda 3 Turbo have this issue? My exhaust tips are covered in black soot too... 12k miles on it currently. 2nd owner, owned it since July. I wonder if this TSB will expand to 2022 Japan built models at some point too...

 

I've got a 22 Turbo with about 7200 miles. Was halfway down on the dipstick, drove 600 miles and the low level light came on.

I'm taking it in to the dealer tomorrow. Have been lazy to see if the TSB applies, but I want to get it on record or fixed, either way.

 

given that the MY22 2.5T built in Mexico has the issue, it would seem reasonable to assume that all 22 turbos would be built with the same exhaust valve seals. But with parts shortages recently, perhaps less consistency?

 

Here is an update re the new tsb .

So put in a call to my local dealer, no call back, but they’re busy, and having met them, I can handle that.
Spoke to a couple of people at Mazda USA customer relations (5500 number in Florida) .Again nice people, but knew nothing about the tsb, so I forwarded the whole thing. The agent put me on hold to speak to a supervisor presumably. She came back and told me I had no business being on possession of the document and that it was only for the eyes of Mazda USA and their dealers. She was much nicer than that sounds and was only repeating what she had been told.

I now have a case number assigned and expect (maybe) a call back in a day or two. I asked her to alert whoever calls me back that I won’t be expecting a lecture.

My m.o. here is not to demand an instant fix, after all who wants to be the canary in the coal mine here, I’d rather the techs warm up on someone’s else’s vehicle. I simply want to understand what the process is. Sit tight and wait ? Keep calling the dealer ? Is all I want to know.