I just didnt want to take the chance just for $8 or so.
Page 238 of the manual that you can download from www.acura.com
"Always use Honda All Season
Antifreeze/Coolant Type 2. This
coolant is pre-mixed with 50 percent
antifreeze and 50 percent water. It
does not require any additional
mixing. If it is not available, you may
use another major-brand non-silicate
coolant as a temporary replacement.
Make sure it is a high-quality coolant
recommended for aluminum engines.
However, continued use of any non-Honda
coolant can result in
corrosion, causing the cooling
system to malfunction or fail. Have
the cooling system flushed and
refilled with Honda antifreeze/
coolant as soon as possible."
If you search for silicate you'll get to this post
"It may also be wise to suggest the use of non-silicate coolant. Honda like many other import vehicles with aluminum parts should consider using this type of coolant as suggested by honda. Silicates over time act as a sand blaster to your water pumps and radiator, eating away at it. I honestly cannot say I have seen a failure due to this in person, but I have read much on the subject and feel it is a worthwhile investment to prolong the life of the cooling systems by getting the closest thing to meet honda specs.
Honda coolant is expensive and supposedly lasts 60,000 miles and is good stuff. Zerex G-05 is a new product and is a good alternative as it is the closest to conform to Honda specs and is much sought after by owners of European cars. Another option is the Extended Life coolant such as Zerex 5/150, but that would require you to fully flush the coolant system first since it is not compatible with the green stuff, but is phosphate, borate, and silicate free. Do not mistaken this for Dex-cool, even though it is similar in color. It is Dex-Cool compatible, but is not Dex-Cool by any means. Dex-cool turned out the be some bad stuff and would precipitate in cooling systems and clog heater cores."