Prime brand coolant in diesels - Ford Powerstroke Diesel Forum
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Old 08-15-2012, 07:41 AM
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Prime brand coolant in diesels

I work at a highway department that uses bulk quantities of Prime coolant in everything from a Volvo semi, International dump trucks, Cat heavy equipment, cars and trucks, mowers and small engines. Everything (once the OEM coolant is scheduled for replacement after its life is up) gets this "fleet" coolant...and "fleet" Cit-Guard 15W-40. And everything goes the distance before it's trashed and sold at auction. I've never seen any oil related, or coolant related failures. It's just brakes, tires and go go go. And an occasional electronic problem. No real stress or much of anything. No VC9 flushing, no backflushing, nothing special.

Prime's information on coolant shows the following.

ASTM D 3306, D 4985, D4340
SAE J 1034, J 1941
GM 1825M, 1899M
General Services
Administration
CID A A-52624
Cummins 90T8-4
Detroit Diesel 7SE 298
The Maintenance
Council RP 302B
Ford New Holland
Mack
White/GMC
Freightliner 48-22880

Prime recommends this for HD use:

For heavy-duty vehicles only:

Add SCA (for topping off conventional coolants) or Extender (when used with other Extended Life HD coolants) based on treat rates recommended by engine manufacturer (see owner's manual).
Do not overcharge antifreeze/coolant with Extender or SCA.

Is this something that somehow doesn't fit well with a 6.0L PSD? I can buy the stuff from our vendor cheap. And use it in other things I have as well.
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Old 08-15-2012, 11:51 AM
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It says right there it requires the use of SCA or Extenders for our trucks. This means monthly monitoring coolant and adjusting as needed. Why bother with that when you can put a Cat EC-1 rated ELC coolant in for $80-$90 and run it for 300k miles before it needs attention. Hell I bout a 6 gallon case of Delo ELC for $105 and did my truck and car. So the answer is yes you can run that stuff but why would you want to? Is it really going to save you enough to be worth the extra maintenance?
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