I started to do some reasearch and found the above article which seemed to explain new and old cannot mix. My friend spent the better part of the next day chemically flushing his jeep and wow what crud. From all appearances the two types of anti-freexe just jelled and really mucked things up. Lesson learned by the group, carry compatible anti-freeze. So we decided to all use the Prestone universal stuff I was coming up on 5 years so it was time to flush. We decided to have a flushing party being responsible and recycling the anit-freeze.
Hopefully all will be well in mudville.
Coasty