Regarding DTB's power steering fluid question, my 04 STR specs Dextron IIE. I E-mailed Castrol and their recommendation is their Dex/Merc Domestic Multi-Vehicle ATF specifically for my car per their lube guide.
They responded quickly and recommend contacting them if you have any questions.
I hope this helps.
Regards.

 

Did not discuss the "particles" in the additive with the service manager but it made sense to me that the particles should not be filtered out as they were there for a reason. The instructions on the bottle were in German, French and Russian!