Best coolant for our 60-70's Mopars?

The Evans product looks fabulous. If cost were no object, I'd use it in a heart beat.

Right now, I use straight Prestone (green stuff) and distilled water. I add a can of water pump lube. Change it every 2 yrs. Cost of the last change was $37.08.

The best price I could find on Evans was $43.80 per gallon. That makes a 4 gallon change a whopping $175.20. That does not include the ride to the Edge of the World. If I read the information correctly, the Evans product requires replacement every five (5) years.

So. Is Evans worth it? The problem is that the initial cost is so much higher and the lifespan is not so much greater than normal WalMart type maintenance, the numbers don't justify it. The crossover point wouldn't happen in the lifetime of my grandchildren's grandchildren.

To the OP, I recommend good quality antifreeze, distilled water, and a can of water pump lubricant every 2 years. If it can be determined that a premix uses distilled water, then use just a can of water pump lube along with the premix. The idea behind the distilled water is to keep calcium and lime deposits out of the cooling system where it can clog passages and play havoc with the water pump bearing seal.

As a technique note, I put the anti-freeze in first, then the pump lube, then the water. That way it is only distilled water that has to be added to top the system off. Rarely has the engine used all of the water it should after a change. I figure it's due to air pockets. After a couple of decent trips, it will take more water. If topping off through a coolant recovery system, when the coolant in the reservoir is the same color as the coolant in the radiator, everything is well mixed.