[C320-list] FW: Re: Engine AntiFreeze

[Karl Mielenhausen _/)]

The DEX-COOL-type antifreeze that Yanmar now apparently recommends would be the ORANGE antifreeze. Dexcool is an OAT-based extended-life coolant (OAT stands for Organic Acid Technology). DEX-COOL is a trademark of General Motors. Look for "DEX-COOL approved" on the label. Some brands are: Prestone Extended Life 5/150, Havoline DEX-COOL, Zerex Extreme Life 5/150, Pennzoil® DEX-COOL® Extended Life. DEX-COOL-type antifreeze is a ethylene glycol, diethylene glycol blend without silicate, phosphate, or borate inhibitors. 



The RED antifreeze is an extended life coolant also, but does NOT carry the DEX-COOL label. It appears to be ethylene glycol based with the OAT inhibitors.



>From what I have read, mixing the orange with residual green can cause cause dilution of the OAT inhibitors at best and precipitation of the EG's silicates at worst. In other words, make sure all traces of the green is gone. I would expect red to have the same problems since it is OAT-based. I've seen some hybrid formulas marketed as being compatable with all types. I believe the hybrids are YELLOW!!



DO NOT CONFUSE ANY OF THESE WITH THE ANTIFREEZE SOLUTIONS USED TO WINTERIZE (FREEZE-PROOF) WATER LINES.



I am confirming Yanmar's recommendations with an email to Mack Boring tonite. Will report on what they have to say.



Karl Mielenhausen

2000 C320 Hull#690 "Silver Lining"

New Bern, NC

http://members.cox.net/mielen/



From: Russell Monaco [mailto: russgm at yahoo.com]

To: C320-List at catalina320.com

Date: Tue, 18 Apr 2006 13:42:34 -0700 (PDT)

Subject: Re: [C320-list] Engine AntiFreeze



me too...by the way i have read all about the difficulty in switching over too, i just wonder, what would really happen if you just mixed the two?  anyone know? would it explode or something?<br>  russ monaco<br><br>Chris Holt <oldman1030 at hotmail.com> wrote:<br>  What do people use for antifreeze in their Yanmars?<br>I know about the red Dexcool stuff but right now I have the green stuff and I don't want to switch over (at least not right now).<br>I just need to "top it off".<br><br>Thanks,<br><br>Chris<br>#447<br>!!- _______________________________________<br>!!- C320-List at catalina320.com mailing list<br>!!- Archives Here: http://www.catalina320.com/list/archives<br>!!- Change Subscription Here: http://www.catalina320.com/list/change<br>!!- Subscribe Here: http://www.catalina320.com/list/join<br><br><br>		<br>---------------------------------<br>Blab-away for as little as 1¢/min. Make  PC-to-Phone Calls using Yahoo! Messenger with Voice.<br>!!- 
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