Here's a test that will help satisfy your curiosity.....
Drain off a cup ful of the antifreeze.... take it home and heat it to
about 180 degrees F on the stove top (use a candy thermometer) then if
its propyleneglycol use the test strips ( get them in an atuo supply
shop) to find out the freezing point of the mix; if ethylene glycol
take the same cupful, heat to 180degrees and get an inexpensive
'antifreeze' indidcator form an auto suipply store (with the teeny
little balls inside of a plast tube) and check it.
IKf either of these checks indicate near 100% cencentration of the
antifreeze, then drain some of it and add the proper mixture based on
the expected low temperature. :-)



In article , Dave
wrote:

On 13 Jan 2006 07:01:01 -0800, "markvictor" said:

"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...

Actually, two types of it are sold. One has a corrosion inhibitor and is for
engines. The other doesn't.