"The straight RV stuff"...are you talking about the red -non toxic
fluid for winterizing the potabke water system?... That isn't designed
for your engine, it's for your plumbing...
If not, and you're referring to a glycol based anti-freeze, the reason
no mixing is required is that you are buying a jug of 50% water....it's
a lot cheaper to buy it undiluted and add your own water....I know you
already have done your winterization, I'm just pointing out the
difference....

regards,
markvictor
http://groups.google.com/group/badboatbiz