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...