Acura 2009 TL Owner's Manual page 560

Automatic Transmission Fluid
5. If the level is below the lower
mark, add fluid into the filler hole
to bring it to the level between the
upper and lower marks.
Pour the fluid slowly and carefully
so you do not spill any. Clean up
any spill immediately; it could
damage components in the engine
compartment.
Always use Acura ATF-Z1
(automatic transmission fluid).
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6. Insert the dipstick all the way back
into the transmission securely as
shown in the illustration.
Make sure the rubber cap on the
dipstick fits in the dipstick guide
and that you push the dipstick in
all the way.
The transmission should be
drained and refilled with new fluid
when this service is shown on a
maintenance message in the multi-
information display.
If you are not sure how to check
and add fluid, contact your dealer.
Use only Acura ATF-Z1 (Automatic
Transmission Fluid). Do not mix with
other transmission f luids.
Using transmission f luid other than
Acura ATF-Z1 may cause deterioration
in transmission operation and
durability, and could result in damage
to the transmission.
Damage resulting f rom the use of
transmission f luid other than Acura
ATF-Z1 is not covered by the Acura
new vehicle warranty.