I've had a LeSabre (350) for years and years, but haven't done much with it for years and years. I've recently gotten a 69 Electra (parts car) with a running 430 and it's quite low on coolant. It's going to be stored outside and winter is coming soon. Both cars have copper/brass radiators. The LeSabre is a replacement, the Electra may be the original. Long ago, I think I read something about modern long-life coolants not being the best for the old soldered radiators.... something about solder bloom? So.... the question is, do I need to be shopping for the old fashioned green non-longlife coolant, or is the modern stuff actually ok now that people have gotten used to the idea of using something newer? I've been searching the board and have not found this information. Most of my experience is with aluminum/plastic radiators.
Use the old green stuff in your old cars. Do not mix with the newer long life stuff. Car won't blow up if you do but the coolant will do weird things.
I wouldn't worry at all about the coolant. Just buy coolant you can mix with any color. Just stay away from Dexcool (orange)
I think the Electra currently has conventional green, so I'll probably just stick with that as I don't feel like flushing it just to park it "out back". I also don't want to disturb the old and questionable radiator hoses any more than I have to. Thanks for the responses.
The coolant they commonly sell today is engineered to be compatible with whatever is in the engine now. It tells you that on the container. I wouldn’t give it a second thought.
If you will not change it out come spring and want to put in the best you can by with all its advantages, then Evan’s brand coolant will suck your wallet dry nicely, lol!
No thank you.... too fancy for me. I'll use the green. I found the 1/2 gallon in my garage that I thought I had, but couldn't find when I originally started this thread. I spend less, and free up some space!
