Best coolant for our 60-70's Mopars?
I see Evans coolant as a solution to a question that I never asked. ...
You are confusing us. MoparMan318 asked the question which started this thread.
Evans is not for anyone who runs at tracks that require straight water. I can't imagine the hassle of going back and forth, or forgetting and leaving pure water in thru the winter and cracking the block.
I recall paying $48/gal off ebay by the case. I recall NPG+ version, but the name changed over the years. I am down to my last gallon, so about to order another case. Some have pondered buying cheaper propylene glycol coolant at auto parts and running it straight (similar/same as some Evans products, older versions?). It is sold as an "environmental alternative" since doesn't kill animals, but I haven't seen it in CA (imagine that). I am smart enough to carry extra Evans in the trunk, plus hoses and clamps for emergency repairs.
The biggest downside is scheduling the change, since it isn't easy to get all the water out. Best when doing major work and/or radiator swap. Remove the block drains. I blow ethanol thru, then leave to evaporate, plus have a nepheloator (air pump for fat sleepers) bought at a garage sale I leave puffing our dry summer air thru. Sometimes it dries all summer. Not purposeful, my projects tend to drag. It may come out cheaper in the end since regular $15/gal coolant needs replenishment every 3 yrs (who remembers that). To me, the reduced maintenance is worth the cost. If you save a $350 aluminum radiator, it paid for itself. Of course, if it overheats your engine and warps an aluminum head it didn't, so read up and weigh your risks.