>  How about this orange stuff that's made for aluminum motors. Is it any
>good or does it have phosphates in it. It says it's good for all alum.
>blocks. Anybody use this stuff.

I use the Prestone extended life orange stuff.  I started using it about 8 years ago, when it specifically said phosphate free and did not say dexcool compatible.  A few years later, they added the dexcool compatible statement.  I emailed them and confirmed that it could be mixed with the older stuff.

Since then, they have changed the bottle several times and I haven't checked with them.  I recently removed the heads and found NO pitting or signs of corrosion. (after 8 years and 40k miles)  I did find orange "mud" in the expansion bottle and a thin orange coating on the inside of the water jacket, so I flushed the system before re-filling.

I'm going to keep using the Prestone, but the "mud" bothers me.

Cost is under $10 a gallon at the local FLAPS.

Bill
>