Wow - at last someone made a thread on this self-proclaimed great filter and oil shop..
I myself have been 'stung' by them a year ago - I sent mechanics to get Toyota T-II auto transmission fluid. Filter House Ferozepur Road (since they did not have that in stock), highly recommended, nay, pushed the mechanic to buy Dex-III instead, stating that it works fine and that they have used nothing but DX-III for many years now..the mechanics promptly came back and changed the auto trans fluid on my car without thinking (trusting a BIG name like Filter House to know what they were talking about). I was not around at this time, or would've
sliced off a few heads..
Simply put, I was cheated out of my hard earned money due this obnoxious and baseless assumption by Filter House. I had to buy double the amount of T-II fluid to actually properly flush the system of the sh*# that DX-III is..
I even went so far as to print a Toyota Factory Service Bulletin (which I will find and paste on here a little later today) - this bulletin firmly states that "T" and "D" series should not be considered alternates, should not be mixed, and whatnot. Technical reason is of course the different composition of gears, requirement of various friction modifiers, etc.
A friend who used to love Filter House, upon hearing this news from me, chided me about it, and said it must be the mechanic's mistake. He called Montgomery road and Defence branches in front of me (on speaker), and even those 'knowledgable' folks recommended the same things....to replace with DX-III.
My friend is still flabbergasted...and none of us have ever gone back to them..ever..
In the absence of customer orientation, lack of quality checks, and big investors easily buying off the law, we can't expect much more, can we? ;(
Edit : Here is the excerpt from the Service Bulletin:
Technical Service Bulletin that may be helpful when changing out your transmission fluids:
A/T - Fluid Recommendations
TRANSMISSION & CLUTCH
TC003-99
September 10, 1999
Title:
AUTOMATIC TRANSMISSION FLUIDS
Models:
All Models
REVISION NOTICE:
The information contained in this TSB updates TC003-98 dated June 19, 1998.
Introduction
Automatic Transmission Fluid Type T-IV now replaces Type TII fluid. Use Type T-IV for all applications that specify ATF Type TII.
Please refer to the following table for the interchangeability between each ATF.

Applicable Vehicles
^ All vehicles produced after 1990 with Automatic Transmissions specified to use ATF Type T, T-II and T-IV.
NOTICE: With the exception of mixing ATF Type T with Type T-IV fluids, different types of fluids must not be mixed.
Parts Information
SIZE NEW PART NUMBER PART NAME
4 Liter 08886-01705 ATF Type T-IV