[C320-list] anti freeze

[dprudden]

Bill,
What color is your antifreeze? If it's the traditional green, then you should be able to use auto antifreeze. If it's orange, then you have Dexcool and you absolutely can't mix the two. There is often a reaction between the two where the antifreeze jells, and ruins the engine, so be sure you know what type of antifreeze is in your engine. Karl Mielenhausen wrote a good article a few years ago on the procedure to change antifreeze types (it's easy to do-I did it last fall). 

BoatUS recommends changing coolant every 2 years. The antifreeze chemicals still work-apparently it's the lubricating chemicals that are no longer effective. I thought every 5 years was enough....I guess I need to rethink that.

David Prudden
#787

Sent from my iPhone

> On Apr 2, 2014, at 12:06 PM, wflowe3 at aim.com wrote:
> 
> 
> my antifreeze overflow reservoir is empty. I have some Prestone auto antifreeze, does it make any difference what kind I use?  2008 Yanmar diesel.
> 
> Bill
> #1146