http://www.royalpurple.com/prodsa/prpice.html

was wondering if it's worth while

I have not seen that one, but I have heard good things about RedLine's Water Wetter. I would surmise that Purple Ice is the same idea.

I bought a couple of bottles a few years ago for my Camaro. Only used one bottle. Probably wasn't a strong enough concentration in the radiator to notice any difference. That stuff is supposed to be really good for race applications. If anyone is interested in trying it, I can mail you the bottle that I have.

Did the engine stay cooler in regular driving?

this guy on clubgp says he uses it and it drops the engine temp 8-12*

http://www.clubgp.com/newforum/tm.asp?m=2437237&p=1&tmode=1&smode=1

it says "For use with antifreeze -- 1 oz. / quart of cooling system capacity" . anyone know the capacity on a 2000 GTP? I can't find anything in the owner's manual, but I found a place near me that sells this stuff for $12.

I use it in both my GP & Vette and do notice a small heat drop 5deg.F ,I also use royal purple oil in all my vehicles a bit pricey but worth it I think ,Chico.

Is Royal Purple strictly a synthetic oil? My car has 91k on it (got at 88k) and I've been told switching to synthetic at this milage is inviting trouble to cause leaks. Input?