Just about to flush my 05 6.0 Cooling System and was wondering what coolant to go back with. I've read to go Cat EC-1 Rated and I like the way the amsoil coolant looks on paper but am a little confused on whether it is rated Cat EC-1.

This what it says:
APPLICATIONS

AMSOIL Antifreeze & Engine Coolant can be used in any applications requiring the following specifications or tests:

ASTM D 6210, D 3306
Caterpillar EC-1
Chrysler MS-7170, MS-9769
Cummins CES 14603
Detroit Diesel 93K217
Ford WSS-M97B51-A1, WSS-M97B44-D
Freightliner 48-22880
GM DEX-COOLŽ
John Deere 8650-5
Mack Trucks CN H
TMC RP-330
US Military CID A-A-52624-A

Go or No Go?

https://www.amsoil.com/shop/by-produ...ngine-coolant/

 

I do not believe the Amsoil coolant carries the EC-1 cert. It is EC-1 compatible and there are plenty of trucks on the road running it.

 

It says it is: nitrates, nitrites, phosphates, silicates, borates, amines or molybdates free. From what I've read it's the silicates I don't want it there

 

Try giving them a call (715) 399-8324

Their tech guys will be able to tell you what you want to know.

 

After reading some more I just ordered Shell Rotella ELC.