Coolent Flush
Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
this is a confusing subject. I've been digging around the net and heres some basic info that might help:
Old green coolant= lots of silicates. everyone agrees, don't use it in a 6.0.
OAT coolant= No silicates.
DexCool came first. It was supposed to last a looong time but doesn't play well with silicone sealers and gaskets. Only for use with vehicles designed to run it. Interesting that Ford lists a compatable product on it's website. It is orange. not sure what if any Ford vehicles use it.
Other formulations came after, cranking down the chemicals (nitrates and phosphates to name a couple) and changing up the additive package to make them more universal, meaning less harmfull to gaskets and seals. This group includes the CAT EC-1.
HOAT coolant= small ammount of silicates. The substitute chemicals used in the OAT are still eating gaskets (and heat transfer rates are down) so it's decided to crank 'em down farther ad add a little bit of silicate back. best of both worlds kind of deal. Lasts a long(er) time and easy on the "soft parts" of the engine. This group includes Ford Gold.
Also there was a change to the base from Ethylene glycol (EG) to Propylene glycol (PG) to make it less toxic. PG is often labeled as "non-toxic antifreeze". PG can get very acid over time (EG) not so much, so that consideration also caused some of the changes to the additive packages of all three types mentioned above (when sold as non-toxic).
Hope this helps a little.
Old green coolant= lots of silicates. everyone agrees, don't use it in a 6.0.
OAT coolant= No silicates.
DexCool came first. It was supposed to last a looong time but doesn't play well with silicone sealers and gaskets. Only for use with vehicles designed to run it. Interesting that Ford lists a compatable product on it's website. It is orange. not sure what if any Ford vehicles use it.
Other formulations came after, cranking down the chemicals (nitrates and phosphates to name a couple) and changing up the additive package to make them more universal, meaning less harmfull to gaskets and seals. This group includes the CAT EC-1.
HOAT coolant= small ammount of silicates. The substitute chemicals used in the OAT are still eating gaskets (and heat transfer rates are down) so it's decided to crank 'em down farther ad add a little bit of silicate back. best of both worlds kind of deal. Lasts a long(er) time and easy on the "soft parts" of the engine. This group includes Ford Gold.
Also there was a change to the base from Ethylene glycol (EG) to Propylene glycol (PG) to make it less toxic. PG is often labeled as "non-toxic antifreeze". PG can get very acid over time (EG) not so much, so that consideration also caused some of the changes to the additive packages of all three types mentioned above (when sold as non-toxic).
Hope this helps a little.
then i got busted over a technicality tat international makes the 6.0 and not ford. same damn thing if u ask me. if anything, ford has a stake in international if they dont own it already. it was their designs anyway. international or navistar or ford, it still comes back to ford.
sorry i was ranting.
i'll rep u for ur time. lol. 
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
I don't know much about the business side of the Ford/International relationship so I really can't say much there. I thought it was interesting that Ford has an OAT ( no silicate) formula listed on their website but don't recommend it for the 6.0, deciding to use the low silicate HOAT instead.
I wouldn't sweat the correction, (right or wrong) it happens to most of us sooner or later, especially us non-Techs, and it helps other folks in the process.
I wouldn't sweat the correction, (right or wrong) it happens to most of us sooner or later, especially us non-Techs, and it helps other folks in the process.
Posting Guru
Joined: Oct 2006
Posts: 1,693
Likes: 7
From: Francestown, NH
Sometimes you have to pipe up. Then when someone else chimes in either you gain new knowledge, or they get corrected and then they learn something ... and round and round it goes .....
except for mpg threads ...
.... and especially when the mpg threads become heated ... 
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Yup, LOL, I learned my lesson there. Getting agitated over something that's unproveable and of little consequence is pretty stoopid! I'll be stayin on the sidelines for those threads in the future.
Last edited by Rusty Axlerod; Sep 29, 2011 at 07:58 AM. Reason: Finish thought- stupid cellphone
Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
^^^ 100% agree
Sometimes you have to pipe up. Then when someone else chimes in either you gain new knowledge, or they get corrected and then they learn something ... and round and round it goes .....
except for mpg threads ... .... and especially when the mpg threads become heated ...
Sometimes you have to pipe up. Then when someone else chimes in either you gain new knowledge, or they get corrected and then they learn something ... and round and round it goes .....
except for mpg threads ...
.... and especially when the mpg threads become heated ...
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