I know there are many posts re: which antifreeze but does anyone have any knowledge of Cat EC-1. Claims long life and all SCAs. Local walmart has it for $19.95. Any advise appreciated. I have the green stuff in early '99. Thanks, Carroll

 

Sorry, I believe price was $9.95. Carroll

 

I heard it adds 5hp.

 

Cancel this post. Just found info in earlier posts. Carroll

 

Shell makes a similar coolant... Shell Rotella ELC. Kwik had a thread about it a while ago, heres the link https://www.ford-trucks.com/forums/s...d.php?t=425456 . Theres a debate over wether its compatable with certain model year engines. Ford says no, some owners say they havent had problems. I'm considering doing it to mine this summer, just so I don't need to worry about the SCA's for another 300k miles. If you're planning to do it, read up on it before hand. You need to make sure to get ALL of the old coolant out. While you're at it, throw a coolant filter on there to catch all that gunk floating around. Its amazing how much sand is left over from casting...

 

The Cat EC-1 rating is exactly what you need. Any coolant with that rating or the ASTM D-6210 rating will work without the need for supplimental additives. The ASTM D-4985 is also a heavy duty spec. coolant, but will require the use of SCA's. ASTM D-3306 is your basic light duty coolant that you want to stay away from.

 

Thanks for all the info. Carroll