ATF Z1 vs ATF DW1 - Honda Pilot - Honda Pilot Forums

Register Home Forums Active Topics Insurance Photo Gallery Garage Search Today's Posts Mark Forums Read Auto Escrow
Piloteers.org is the premier Honda Pilot Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Rate Thread
Old 07-31-2010, 12:16 PM   #1 (permalink)
Registered User
 
Join Date: Oct 2007
Posts: 105
Feedback Score: 0 reviews
Default ATF Z1 vs ATF DW1

Is ATF DW1 backward compatible with Z1 or does a complete flush have to be done when changing over?
I have a 2003 Pilot EXL and the Dealer sold me DW1 because Z1 is discontinued. Never noticed til I got home and drained the tranny...and the dealer is closed today and cannot get an answer from them.
harley909 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 07-31-2010, 12:35 PM   #2 (permalink)
Super Moderator
 
humanoid's Avatar
 
Join Date: Sep 2004
Location: Sunny SoCal
Posts: 3,757
Feedback Score: 0 reviews
Send a message via Yahoo to humanoid
Default

From all accounts on the internet, it's not backward compatible. It looks like it's only for 2011+ vehicles.
__________________
<------------ click here first, n0oB!!!
humanoid is offline   Reply With Quote
Old 07-31-2010, 02:17 PM   #3 (permalink)
Registered User
 
RSQ Pilot's Avatar
 
Join Date: Aug 2008
Location: Central IL & Many Road Trips
Posts: 1,801
Garage
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by harley909 View Post
Is ATF DW1 backward compatible with Z1 or does a complete flush have to be done when changing over?
I have a 2003 Pilot EXL and the Dealer sold me DW1 because Z1 is discontinued. Never noticed til I got home and drained the tranny...and the dealer is closed today and cannot get an answer from them.
Not sure on compatability but this may have the answer...if only we could open it...

***.in.honda.com/Rjanisis/pubs/SB/B10-020.PDF

***=www
__________________
2009 Pilot Touring RES 4wd Mocha Metallic; OEM Premium Running Boards, OEM cargo tray, Weathertech Floor Liners, H-9 LB mod, full size LTX spare w/alloy rim, AVS Bugflector II
2010 Honda CR-V EX-L AWD Taffeta White...OEM cargo tray, mudguards and WeathertTech floor liners; Blue Ox dinghy setup.
2007 Winne Aspect 26A; Ford V10 gas hog, Blue Ox dinghy setup.
RSQ Pilot is offline   Reply With Quote
Old 07-31-2010, 04:47 PM   #4 (permalink)
Registered User
 
Join Date: Oct 2007
Posts: 105
Feedback Score: 0 reviews
Default

I ended up getting in contact with the Service Manager at the Dealership who told me it is infact 100% compatible. He told me that he got a bulletin from Honda with the ATF DW1 that said this.
He actually called me from home after I dropped into the Dealership today and talked to the Manager, who called him at home....nice.
I filled the Pilot back up with DW1 and it seems to work just fine so far.
Guess I will be the "guinea pig".......
harley909 is offline   Reply With Quote
Old 07-31-2010, 04:56 PM   #5 (permalink)
Registered User
 
RSQ Pilot's Avatar
 
Join Date: Aug 2008
Location: Central IL & Many Road Trips
Posts: 1,801
Garage
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by harley909 View Post
I ended up getting in contact with the Service Manager at the Dealership who told me it is infact 100% compatible. He told me that he got a bulletin from Honda with the ATF DW1 that said this.
He actually called me from home after I dropped into the Dealership today and talked to the Manager, who called him at home....nice.
I filled the Pilot back up with DW1 and it seems to work just fine so far.
Guess I will be the "guinea pig".......
Great news....from what I was able to find it appears to be a synthetic (blend??) ATF to replace Z-1 but the shop bulletin has the straight info.
__________________
2009 Pilot Touring RES 4wd Mocha Metallic; OEM Premium Running Boards, OEM cargo tray, Weathertech Floor Liners, H-9 LB mod, full size LTX spare w/alloy rim, AVS Bugflector II
2010 Honda CR-V EX-L AWD Taffeta White...OEM cargo tray, mudguards and WeathertTech floor liners; Blue Ox dinghy setup.
2007 Winne Aspect 26A; Ford V10 gas hog, Blue Ox dinghy setup.
RSQ Pilot is offline   Reply With Quote
Old 08-24-2010, 03:42 PM   #6 (permalink)
Registered User
 
Join Date: Apr 2010
Location: Ontario, Canada
Posts: 10
Feedback Score: 0 reviews
Default

Just picked up the same stuff for my 08 and was told a flush is not required.

Dave
__________________
2008 Pilot VP 4WD
98RACE is offline   Reply With Quote
Old 08-25-2010, 12:10 AM   #7 (permalink)
Registered User
 
Join Date: Dec 2005
Location: WA State
Posts: 2,428
Feedback Score: 0 reviews
Default

Posted on another forum was the actual text of the TSB from Honda....

A new ATF will be available for 2011 models in mid-July. Honda ATF DW-1 is the new transmission fluid that helps improve low temperature performance. Initial shipments will be arriving at your dealership soon. Please begin using ATF DW-1 on all 2011 AT models. For AT models 2010 and older, you can continue using Honda ATF-Z1. Future communications will be sent regarding the supply of ATF-Z1 and ATF DW-1.

In typical fashion for double-speak TSB's, it doesn't answer the pregnant question of whether DW-1 can be used on 2010's and earlier. I suspect it can, but it doesn't say so.

- Mark
whizmo is offline   Reply With Quote
Old 08-25-2010, 09:42 AM   #8 (permalink)
Registered User
 
Join Date: Oct 2007
Posts: 105
Feedback Score: 0 reviews
Default ATF Z1 is no longer available

I was told point blank by the Honda Dealer that ATF Z1 is discontinued..period. No longer for sale, cannot be bought by the dealer. All that may be left is old stock.
I have done a change using DW-1 without flushing and made a 2400KM round trip (highway and mountains) and have not had any problems. I have a 2003 with 235,000KM on it. My Pilot has the tranny whine but shifts and works perfectly and the fluid stays nice and clean between changes.
I noticed no difference using the DW-1.
When I questioned the Dealer, they told me they have a "Bulletin" which says that Z1 and DW1 are fully compatible and can be interchanged without a flush. I never got a copy from them, but the Service manager called the Honda Tech People and they confirmed it..
harley909 is offline   Reply With Quote
Old 08-25-2010, 11:04 PM   #9 (permalink)
Registered User
 
Join Date: May 2009
Location: OH
Posts: 674
Feedback Score: 0 reviews
Default

The thing that I have heard is that the new stuff is thinner. Anyone able to confirm that? I question whether this is an improved ATF or just thinner to get better gas mileage ala 5w-20.
carguy07 is offline   Reply With Quote
Old 08-28-2010, 02:47 AM   #10 (permalink)
Registered User
 
Join Date: Dec 2005
Location: WA State
Posts: 2,428
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by harley909 View Post
I was told point blank by the Honda Dealer that ATF Z1 is discontinued..period. No longer for sale, cannot be bought by the dealer. All that may be left is old stock.
I have done a change using DW-1 without flushing and made a 2400KM round trip (highway and mountains) and have not had any problems. I have a 2003 with 235,000KM on it. My Pilot has the tranny whine but shifts and works perfectly and the fluid stays nice and clean between changes.
I noticed no difference using the DW-1.
When I questioned the Dealer, they told me they have a "Bulletin" which says that Z1 and DW1 are fully compatible and can be interchanged without a flush. I never got a copy from them, but the Service manager called the Honda Tech People and they confirmed it..
This all may be true.... but it may not be either. Dealers say the damnest things sometimes. I've had them flat-out tell me bald-faced lies, or spout as gospel some crap story they heard fourth-hand. Mostly they say what will cause whatever they have in stock to go out the door.

OTOH, it may be that corp Honda is deliberately being vague about backwards-compatability so they can exhaust existing stocks of Z1.

Yes, I'm a skeptical cuss.

- Mark
whizmo is offline   Reply With Quote
Old 08-28-2010, 10:26 AM   #11 (permalink)
Registered User
 
Join Date: Oct 2007
Posts: 105
Feedback Score: 0 reviews
Default

I can tell you that my comments are true.
I cannot 100% verify that what the Dealer was telling me was 100% true. After all they did not give me the so called "bulletin" which I should have insisted on seeing. I do have a voicemail that I have kept about it when they called me
harley909 is offline   Reply With Quote
Old 08-28-2010, 07:53 PM   #12 (permalink)
Registered User
 
Join Date: Dec 2005
Location: WA State
Posts: 2,428
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by harley909 View Post
I can tell you that my comments are true.
Don't get me wrong; I'm not doubting your word. I'm just saying that dealers often get it wrong or simply say what they need to say to get the customer out of their hair and on their way. How many times have we heard the story of folks coming in with major/common issues on their cars and being told that the problem was "normal" or "never heard of". There are some really good people working in car dealerships, but they're outnumbered.

And in this case, I think the dealers may be hamstrung in giving customers definitive guidance by (perhaps deliberately) vague wording in the bulletin.

- Mark

Last edited by whizmo; 08-28-2010 at 07:56 PM.
whizmo is offline   Reply With Quote
Old 10-12-2010, 05:20 PM   #13 (permalink)
Registered User
 
Join Date: Oct 2010
Location: Lewiston,Idaho
Posts: 1
Feedback Score: 0 reviews
Default

ATF DW-1 is now the recommended fill for ALL Honda automatic tranmisssions, current and past. Z1 is being replaced entirely by DW-1. There has been no service bulletin as rumored as of yet but the information is contained in the 2011 Odyssey technical information training module.
J Izenhower is offline   Reply With Quote
Old 10-18-2010, 11:26 PM   #14 (permalink)
Registered User
 
samc's Avatar
 
Join Date: Feb 2009
Location: Brooklyn, NY
Posts: 773
Feedback Score: 0 reviews
Send a message via AIM to samc
Default

We believe you Harley909. It's not that we think you're lying, but those stealerships.

Perhaps Tim can come on and verify the two fluids?

I'd just hate to see people down the line with transmission problems because they started using this DW1 fluid. But I myself would like to see a service bulletin/pdf.
samc is offline   Reply With Quote
Old 10-19-2010, 10:22 AM   #15 (permalink)
Site Sponsor
 
hondacuraplanet's Avatar
 
Join Date: May 2002
Location: Buffalo, New York
Posts: 2,026
Feedback Score: 0 reviews
Send a message via AIM to hondacuraplanet
Default

For what it's worth, I can't find a bulletin directly on the DW1.

But, I can tell you this. The Z1 fluid is not discontinued at this point in time, therefore personally until I hear otherwise, I'd stick with the Z1.
__________________

www.oemacuraparts.com
hondacuraplanet is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 12:19 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
Copyright 2000 piloteers.org. All Rights Reserved.