I am located in Kentucky and some neighbors are discussing antifreeze for inboard/outboard engines. No one wants to use ethylene glycol and we are discussing the pink non toxic RV antifreese usually rated for -50 degrees F.
Does this type give adequate protection for our engines during the winter here where it seldom gets below zero but occasionally drops to -20 for two or three nights.
Any advise for or against using the pink stuff will be appreciated.
2005 Stardust 18 X 78 on Green River Lake Ky
Good time of year to bring up this topic. Question is; why not use marine products? That is my suggestion. There are several environmentally safe anti-freezes for marine usage out there. Also remember that on most anti-freeze product labels, the low temperatures indicate the 'burst' point and not the freeze point. IOW that is the minimum low temperature it would take to burst a sealed 1" copper pipe filled with water and the suggested % of that product. The actual freezing temperature is somewhat lower than that.
Chance Favors The Prepared Mind!
I have used the pink stuff for many years as well as the MerCruiser -100 degree anti freeze and have had no problem with either. I am on a portion of the upper Mississippi which does not freeze so I have opted, for the first time, to go with the straight pink anti freeze rated at -50 degrees. I pay about $2.69 per gallon for the pink and about $8.00 per gallon through a dealer for the MerCruiser product.. I would mix two gallons of -100 degree with three gallons of -50 degree and suck this concoction through the drive motors and generator motor. Never had a problem. Why am I going to straight -50 degree? I am retired and funds are lacking. With the river water being in the area of about 36 degrees, I do not think the absence of the -100 degree anti freeze will do any harm. Temperatures getting down to -50 is getting pretty cool and is an extreme rarity so I am not going to worry about it. I'll know in the spring.