Which color coolants can I mix the Pentosin G11 blue with?
 

I'm down, and all my good stuff is in CT. All I have availible to me here is AutoZone, and WalMart - I don't even know if there's a NAPA around.

Doh. I think I can only put water in.
 

"FYI, AFAIK, mixing anything but water with the blue G11 makes it brown.
Your owner's manual warns against doing this, and the possible corrosion
damage caused by such a screwup would have me parking my car until I
knew for sure what they did. Do not mix red with blue, or either with
green. Corrosion will result, and it may happen very quickly. If you
want to change types of antifreeze, VW requires a complete system flush
with water before the change."

<A HREF="http://gti-vr6.net/library/engine/blue_or_red_coolant.html">From here</A>.

The water colored ones.

Sweet. Rubbing alcohol it is, then!

He said you definatley can't mix it with the red coolant

This morning you were complaining that you thought he put the wrong thermostat in your car
 

and "he should know better". Wnat does he tow his race car with? An Audi? And What does the fact that he races 911s have to do with anything. I am sure he is a fine mechanic but you are a total trip.

Don't think that is correct.
 

All I have read says that mixing anything else with G12 (pink) will cause brown pudding.

From New Dimensions Coolant info post: "CAUTION!G 012 A8D A1 must NEVER be mixed with any other coolant.Engine damage will result !
G 012 A8D A1 is red in color.The mixture of G 012 A8D A1 and other colored coolants is immediately identifiable by discoloration (brown,purple etc.)"