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Old     (canada_air)      Join Date: Nov 2003       05-12-2005, 8:22 AM Reply   
i am changing antifreeze in my closed cooling system and was wanting to put in enviro friendly and was wondering what everyone recommends. i was wondering if just plain old -40 RV antifreeze is okay???
Old     (hyrific)      Join Date: Sep 2004       05-12-2005, 8:23 PM Reply   
I used all kinds in our malibu ls1 engine. As far as enviro friendly I didn't know anti freeze could be enviro friendly
Old     (h20jnky)      Join Date: Mar 2003       05-12-2005, 8:49 PM Reply   
this might help explain mixtures and maintenance a little better:
Old     (bob)      Join Date: Feb 2001       05-13-2005, 9:09 AM Reply   
uh ...the kind you put in rv holding tanks so they dont freeze over winter?
Old     (riderx)      Join Date: Feb 2005       05-14-2005, 4:50 PM Reply   
Normal automotive antifreeze uses ethylene glycol to lower the freezing temperature of the coolant. This substance is very toxic to animals and fish and in general is bad news for the environment.

Sierra and some other engine antifreeze / coolants use propylene glycol as to lower the point that the coolant freezes. Propylene glycol is safe enough to be used in foods such as ice cream although I donít suggest drinking your engine coolant.

The pink RV antifreeze is used in r/v pluming and boat ballast tanks to keep the water systems from freezing during the winter. It can even be used to treat potable water systems.


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