I wouldnt hesitate to use todays ELC on an older engine. Way less maintenance and everyone has it. In fact, its getting harder and harder to find conventional green.
Still didn't make it to the dealer but TA had this brand for $18 that claims to be approved for and meets the performance requirements of the numbers listed in my manual. Mobil Delvac it is for now.
Tap Water contains contaminants that will break down the Coolant and Antifreeze. Keep two gallons of pre-mix 50/50 in the cab at all times and use only the same spec as factory OEM.
I think they're trying to stand out with that goofy spelling, which is a bad idea. Same as Bud Lite. Lite isn't even a word. (Not even a beer either but that's another subject) Saw Brite Trucking on the road today. Brite isn't even a word. Like that. There are lots of those around.