@jimijam ,
@chris918 , ask and you shall receive!
Was poking around on the internet when considering switching to Redline D6.
==QUICK SUMMARY== (In case you don't want to read on; sources and more info below)
- Blackstone recommends 1x3 every 15k due to additive depletion
- Blackstone recommends 3x3 if solids buildup.
- Z1 and DW1 have low flashpoints and are highly friction modified to maintain shift quality (FM is an 'additive' on the base oil)
- Redline D4/D6 seem to be recommended, with good results with Amsoil/Valvoline ATF as well.
==DEEPER DIVE==
Feel free to correct me if I'm wrong.
Blackstone Used Oil Analysis performed on DW1 1x3 seem to suggest 1x3 drain/fill every 15k.
They SPECIFICALLY mention the additive pack. They also mention a 3x3 if solids build up.
Source 1: HondaOdyATFreport080210.jpg Photo by rinconvtr | Photobucket
Source 2:
OdyATFJan2011.jpg Photo by rinconvtr | Photobucket
*Note: Although source 1 says Z1, forum posts by 'rinconvtr' confirm that DW1 is being used
Source 3:
Another UOA - ATF and Motor
The flash point for DW1 and Z1 have very low flash points (170C for both).
Mobil 1, Redline D4, Amsoil: 234-236C.
Royal Purple ATF: 216C
Source:
http://www.driveaccord.net/forums/45-fluid-dynamics/65623-new-dw-1-atf-may-not-synthetic.html
==Other findings==
DW1 and Z1 are both very highly friction modified. This is in an attempt to maintain shift quality in tiny cars like the fit, but also in heavy/powerful cars like the Ridgeline.
Friction modifier seems to increase slip as engagement happens
Source:
https://bobistheoilguy.com/forums/ubbthreads.php/topics/2229041/94exa2#Post2229041
DW1 seems to start at lower viscosity when new. Source chart has Z1, DW1, RL Racing, RL D6, RL D4, Amsoil and a lot of other fluids.
Source:
http://www.odyclub.com/forums/attac...line-d4-vs-dw-1-atf-viscosity-100-then-40.jpg
DW1 appears to have better share resistance than Z1, in part due to being semi synthetic.
Although Z1 starts at a higher viscosity, it does appear to shear very towards and sometimes getting worse than DW1 levels.
Source:
https://bobistheoilguy.com/forums/ubbthreads.php/topics/3293685/Quakish#Post3293685
In spite of this, the flash point for DW1 and Z1 are the same, and very low compared to other ATFs as mentioned above.