Coolant options

I have 7 gallons of distilled water sitting on a shelf in my garage just for mixing with antifreeze. It's less than $1.00 a gallon at wally world. I always hang on to an empty water jug as well, makes it easy to mix 50/50 with a gallon of concentrate.

The universal long-life sounds like a good idea, just to not have to flush the system every 2 years I might try that next time.

The type of coolant/antifreeze you run won't make any difference in how the engine cools. Ratio of mix with water, yes, but if you're overheating switching the type of coolant won't do jack.