PEH, there's an anti-cavitation additive that I need to put in the coolant for my truck (while cavitation isn't as big of a problem with the 6.9l as it is with the 7.3l IDI, it is still something to be concerned about, especially in a higher-mileage engine). The big advantage with the ELC is that the SCA is already integrated into the coolant, and is designed to break down very slowly...CAT recommends that the coolant be replaced every 600K miles or every 6 years.

I'll admit to not knowing that much abou the Evans coolant, although if it's not a low-silicate coolant, I actually can't use it in the truck...

Thanks!