Why the large discrepancy in rv antifreeze prices?

Not sure what the heck you are looking at, but if you look at the manufacturers recommendations and buy the manufacturers recommended AF, they should all run about the same price. I suppose you could compare regular gas and Hi-test (OK, Premium to you youngsters) and compare AF and "premium" AF to discover that neither are worthwhile.

https://www.amazon.com/PEAK-Marine-Antifreeze-50%C2%B0F-Guaranteed/dp/B07MBQ5YX3


https://www.walmart.com/ip/Super-Tech-RV-Marine-Antifreeze/17179674

steelhunter wrote:
I've seen prices as low as $2.50/gallon to as high as $15.00/gallon or more.

Is there this much difference in performance?

are you referring to automotive anti-freeze or the pink stuff for potable water systems?

Some RV antifreeze are ethanol (alcohol) based, some are propylene glycol based, some are a mix of the two. Ethanol is cheapest and propylene glycol is highest, normally.
And some stores just charge more.
Some people have concerns about alcohol and rubber seals.

The low price is probably pre mixed or half and half.

The cheap(est) stuff will be tasted throughout the camping season.:( The more expensive will not be tasted after 1 or 2 flushes.:W

I dunno? I get mine at WalMart or Lowe's Home Depot. They are usually a few cents of each other. Right now I have 10 gallons of the stuff at home from last winter. Got the new 5er and first winter winterizing it wanted to make sure I had plenty. Hah! it only took 3/4 of a gallon for the whole trailer! I had lots left over. I won't be buying any more this year, or next year, or the year after that!

steelhunter wrote:
I've seen prices as low as $2.50/gallon to as high as $15.00/gallon or more.

I wonder if both were bottle at the same facility?

some replies are about automotive AF, some about the pink stuff.

rk911 wrote:

steelhunter wrote:
I've seen prices as low as $2.50/gallon to as high as $15.00/gallon or more.

Is there this much difference in performance?

are you referring to automotive anti-freeze or the pink stuff for potable water systems?

Good question, as they aren't interchangeable.