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Mazda CX-5 67,000 mile ATF analysis #4684522
03/04/18 08:50 PM
03/04/18 08:50 PM
Joined: May 2017
Posts: 8
Utah
Themiker Offline OP
Themiker  Offline OP
Joined: May 2017
Posts: 8
Utah
After researching whether I should drain and fill the ATF on my car, it was clear there was absolutely no consensus for this model, Mazda only says it's "life time" fluid, and I couldn't find any ATF analysis for a moderate or high mileage CX-5. So I figured I needed good data to make a decision based on so I drained and filled mine at 66,900 miles and paid for a Blackstone analysis because I was just so curious with Mazda saying you never need to replace the fluid and others saying 30-40,000 miles.

I did buy the vehicle at about 65,000 miles but the previous owner said he didn't remember draining the ATF and wouldn't have done it unless it was part of the scheduled maintenance, which it isn't so I believe this is the original fluid. Blackstone says the fluid is all good and they'd try 75,000 miles but I don't know what the actual numbers mean so comments are welcome! For what it's worth, this is a 2014 Touring.


Last edited by Themiker; 03/04/18 08:50 PM.
Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684536
03/04/18 09:01 PM
03/04/18 09:01 PM
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington
From what I understand, there are two trains of thought. One is to leave the fluid unchanged. Mazda says it is a lifetime fluid but many including myself pause at that thought. The other is to change it every 30k. That also gives you the opportunity to change the filter at the 60k mark. Did you drop the pan?

This Mazda SkyActiv transmission is very good but compact. As long as you stick with the Mazda oem fluid you should be fine. I would also change the differential and awd system fluid as well.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684555
03/04/18 09:23 PM
03/04/18 09:23 PM
Joined: Mar 2008
Posts: 6,811
USA
slacktide_bitog Online content
slacktide_bitog  Online Content
Joined: Mar 2008
Posts: 6,811
USA
WHat kind of ATF did you fill it with? Maxlife is very popular on here, and Castrol makes an awesome synthetic ATF that goes on sale sometimes smile

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684588
03/04/18 09:56 PM
03/04/18 09:56 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
VERY interesting additive package! (Lots of anti-wear stuff)

Thanks for posting!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684589
03/04/18 09:56 PM
03/04/18 09:56 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Does anyone know where all the silicon comes from?


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Mazda CX-5 67,000 mile ATF analysis [Re: slacktide_bitog] #4684609
03/04/18 10:05 PM
03/04/18 10:05 PM
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington
Originally Posted By: slacktide_bitog
WHat kind of ATF did you fill it with? Maxlife is very popular on here, and Castrol makes an awesome synthetic ATF that goes on sale sometimes smile




Hopefully he used the Mazda fluid. This is not your every day variety automatic transmission.


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684634
03/04/18 10:28 PM
03/04/18 10:28 PM
Joined: May 2014
Posts: 1,232
Minnesota
philipp10 Offline
philipp10  Offline
Joined: May 2014
Posts: 1,232
Minnesota
It tells me the Mazda engineers are right....absolutely no reason this fluid should be changed. Nevt time go 150k miles....

Re: Mazda CX-5 67,000 mile ATF analysis [Re: PimTac] #4684661
03/04/18 10:53 PM
03/04/18 10:53 PM
Joined: May 2017
Posts: 8
Utah
Themiker Offline OP
Themiker  Offline OP
Joined: May 2017
Posts: 8
Utah
I didn't drop the pan. It has a drain plug which I used as the purpose was mostly to test the oil. I did use Mazda fluid since their motor oil is so unique, I thought maybe the ATF would also be unique compared to the other brands. My car is just front wheel drive but I do have the differential fluid on my list - I'm just waiting until the weather is nicer.

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684672
03/04/18 11:01 PM
03/04/18 11:01 PM
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
While transmission internals are becoming more robust, I don't believe in Lifetime fluids or Fills, because the chemistry is just not up to the task at this point in time, regardless of what the beancounters and Marketing groups try to convince us.

The new fluid will be cleaning and dispersing the old crud left behind so you might want to change fluid in another 30k or less.


Last edited by MolaKule; 03/04/18 11:04 PM.

Reading is fundamental; understanding is not a given ability.
Re: Mazda CX-5 67,000 mile ATF analysis [Re: philipp10] #4684697
03/04/18 11:27 PM
03/04/18 11:27 PM
Joined: May 2017
Posts: 8
Utah
Themiker Offline OP
Themiker  Offline OP
Joined: May 2017
Posts: 8
Utah
Originally Posted By: philipp10
It tells me the Mazda engineers are right....absolutely no reason this fluid should be changed. Nevt time go 150k miles....


That's what I concluded but I don't know what the actual numbers mean so I thought I'd seek opinions. The insolubles are low and the actual fluid seems like it's in good condition. I think I'll do a drain and fill every 60K miles since you only get 46% of the fluid out. This schedule would mean I'd have 29% of the original fluid at 120K miles and 15% at 180K miles.

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684704
03/04/18 11:56 PM
03/04/18 11:56 PM
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
It is interesting that they are using a small amount of Bariom (most likely Barium Sulfonate) which is a corrosion inhibitor.

Quote:
The insolubles are low and the actual fluid seems like it's in good condition.


Yes, but what about the condition of the friction modifiers due to oxidation? You cannot determine from a $28 basic analysis, and friction modifier chemistry does change over time.

Which brings up another topic and that is shearing. Is this is a low viscosity ATF or a nominal 7.5 [email protected] viscosity fluid? We cannot determine how much shearing occurred unless a VOA is done.


Reading is fundamental; understanding is not a given ability.
Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684729
03/05/18 12:50 AM
03/05/18 12:50 AM
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 5,411
Soviet State of Washington


2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter

Re: Mazda CX-5 67,000 mile ATF analysis [Re: Themiker] #4684878
03/05/18 08:58 AM
03/05/18 08:58 AM
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,233
Iowegia - USA
I didn't see any technical specifications in the link, but I suspect it is a LV ATF (approx. 5.9 to 6.2 cSt) formulated for this specific transmission.

Last edited by MolaKule; 03/05/18 09:19 AM.

Reading is fundamental; understanding is not a given ability.

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