Identify Genuine Mazda Fluids

J

JTS

Joined
Sep 29, 2024
Messages
4
Hello!

I visited a local Mazda Dealer for suggested fluid exchange services at 60k miles on my 2020 Mazda CX-5 AWD for the transmission, differential, and transfer case.

I am reviewing the receipt I got from service, and I noticed that the part numbers mentioned on the final invoice were not (at least obviously) Mazda part numbers for the fluids. I contacted the dealer, and asked if they used genuine fluids. They said they do, but part numbers may not match since they buy in bulk.

The part numbers...
Differential Fluid Service - EG7590S: "75W90 Synthetic Diff Fluid"
Transfer Case Service - EG7590S: "75W90 Synthetic Diff Fluid"
Transmission Fluid Exchange - TR200: "Synthetic MV ATF" AND SB100: "Trans Clean Cond 2-Stepkit"

I looked up the numbers and I found they match third-party products by Mighty Auto Parts. But, the dealer assured me they are genuine OEM.

I want to think the Mazda dealer knows what to use, but I can't help but feel slightly concerned with the Mighty part numbers.

Any insights would be much appreciated.

Thanks!
 
I wouldn’t be concerned over the fluids used but being lied to would upset me. However that’s how they’re able to feed their mouths wonder how they sleep at night though
 
I wonder what % of dealerships use OEM fluids for those services? 0-10%? Or am I too pessimistic?

I think in cases like these you might have to ask if they use Mazda-branded fluids. Maybe that's too optimistic that they wouldn't lie to you then too though.
 
benjamming said:
I wonder what % of dealerships use OEM fluids for those services? 0-10%? Or am I too pessimistic?

I think in cases like these you might have to ask if they use Mazda-branded fluids. Maybe that's too optimistic that they wouldn't lie to you then too though.
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That is my concern of having it done again elsewhere. I don't want to be lied to again for a second 3rd party fluid flush.
 
JTS said:
I don't want to be lied to again for a second 3rd party fluid flush.
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I'm not familiar with Mazda transmissions and their fluid preferences and have never heard anything about them being picky but for the differential and transfer case, gear oil is gear oil (as long as it's the right spec - which isn't rocket science). You have zero reason to have the differential and transfer case fluids re-done, if that's what you're considering.
 
So, out of curiosity, I called 3 other Mazda dealers in my area and asked for the fluid exchanges if they use genuine fluid. All 3 said by default, no. Most said BG is used. You have to special request OEM, and you're charged $100-150 more.

I've certainly learned from this experience: don't assume the dealer uses genuine parts and fluids.

Thanks for the help!
 
JTS said:
I've certainly learned from this experience: don't assume the dealer uses genuine parts and fluids.
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Remember that when some people scream about you can only use OEM fluids or your (insert part here) will explode immediately. What does your owners manual say about things like transmission fluid, differential, etc ? I know Nissan used to use scare tactics down to suggesting you will void your warranty if you use anything else and I thought they actually got sued and lost for that wording.
 
As far as oem fluids go, I insist on it at least for an automatic transmission.

I bought my 2003 accord with 100k on it. Fluid looked perfectly clean but it drove with some odd shifting behaviors. A full exchange with Hondas z1 at the time fixed it completely. I’ve experienced many problems with older Chrysler / Jeep products with the wrong transmission fluids as well.

Not every automatic transmission is so picky (think the aisin automatic that Jeep used in xj cherokees and 93 grand cherokees…it was bombproof and didn’t care if it was Chrysler atf or dexron), but unless I know it isn’t picky, I’m using oem fluid in it.

Differential fluid I wouldn’t be so particular about. Just ensure it’s the right viscosity and grade. If it requires friction modifier, I’d choose to get that additive oem (I know “quality” fluids all include it, but in my experience with certain rears / mainly fords, they chatter until the oem friction modifier makes its way in the fluid).
 
JeffKeryk said:
This thread really surprises me. I would have bet dealers used factory fluids. Trans fluid at the very least. Wow!
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Definitely not the first time people have discovered this but only by looking at the parts breakdown on their invoice or work order. I don't think any dealer advertises "We use non-OEM fluids for your service so we can charge the same amount of money but we make more margin !!". 😂
 
benjamming said:
I wonder what % of dealerships use OEM fluids for those services? 0-10%? Or am I too pessimistic?
Click to expand...
Just as another follow up...

I track both mine and my parent's vehicles maintenance using the CarFax Maintenance Tracker. I saw the back in 2022, the Toyota dealer flushed their Sienna's transmission fluid at 54k (Toyota's interval is, at earliest, 120K). I looked back at their records, and saw the Toyota dealer didn't used OEM oil either, they used "Lucas" instead.

Really shows most dealers don't use OEM fluid, and it certainly isn't limited to Mazda.

Once again, thanks all!
 
I think it's rare now for dealers to use OEM fluids given the restrictions on shipping of flammable and hazardous materials from overseas. I'd definitely send an email to Mazda North America regarding the fact the dealer lied to you.

In future, buy your own fluids and/or OEM parts directly from the dealer's parts department. If you're chummy you might get a regular parts discount and you'll know exactly what you're getting. If the service department gives you issues just show them your official parts invoice.
 
When I worked at a GM dealer zero of the bulk fluids were oem. Also we were part of the BG program even though GM released a bulletin stating not to use any oil additives or fluid flushes. It never felt right to me as a tech. OEM fluids were available if requested.
 
dubber09 said:
If it were me and the car was mine, I'd use MaxLife for ATF (full volume replacement) and a good 75w-90, that's all.
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While I would normally agree with you (and I have used Maxlife ATF in our Honda and Hyundai with success) I would stick with Mazda ATF or an equivalent BLUE fluid because supposedly Mazda checks that if your A/T needs warranty work. I used Aisin's blue Mazda FZ equivalent in our CX-30 with good results.

Having said that I used Royal Purple Maxgear 75w90 gear oil in the rear diff with no problems....it's supposed to meet GL4 and GL5 applications (which I assume means yellow metal safe).
 
jtwrace said:
I'm sure it's fine

https://www.mightyautoparts.com/wp-content/uploads/2024/01/MLP109-SyntheticGearOils.pdf

https://www.mightyautoparts.com/wp-...3/TR200-MIGHTY-VS7-FULL-SYNTHETIC-M-V-ATF.pdf

https://www.mightyautoparts.com/wp-content/uploads/2022/08/ss-mcm-TR120.pdf
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Those look VERY similar to the info for the Mag1 products (which at one time were also the provider for ST gear oils, and may still be?).

Example ...
https://mag1.com/products/industria...il/mag-1-75w-90-gl-5-full-synthetic-gear-oil/
The text is almost word-for-word identical. PDF layout very similar. Etc ...


Good lubes; I've used them for many years with confidence in the ST line.
 
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