I am getting a little confused, again. Currently, I am running GC gold, pre Euro lable. My understanding is that it seemed to be the same base as GC green, but a little different in the additive package. I have gathered that post-Katrina GC may be different again in that the additive package is drifting towards BC (higher Mg, lower Ca). Is my understanding correct? Also, do we know that pre-Katrina Euro lable is different than (or same as) the original GC gold. I have stashes of everything but the post-Katrina ugly bottle (BC, GC Green, GC Gold, pre-Katrina euro lable, and post-Katrina euro lable.). Does anyone have an idea of formulation changes as it relates to either bottle changes or lot numbers (preferably lot numbers)? If not, is there any value in knowning this info? I am getting inspired by LT4 Vette's generosity in another thread, but I haven't acted on it yet.
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=014903
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=014903