Compression Ignition Addict
Join Date: Apr 2007
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The factory fill coolant is Ford Premium Gold. It is not propylene glycol - it is ethylene glycol. This misconception seemed to begin on Powerstrokehelp.com.
The green coolant will absolutely NOT protect your system from corrosion. Also, if you mix the green with the gold, you stand a very good chance of precipitating out silicates which will plug your oil cooler.
Flush it soon and use the VC-9 cleaner from the dealership.
Some folks are using the ELC coolants recommended by Navistar and seem to like them. As posted, lordVader likes the Evans (several others have also posted they like it). Hopefully they are effective in corrosion protection. Only long term usage data will tell.
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