WARNING! Prestone Platinum CONCENTRATE May be mislabeled.

[Proton Dave]

Be sure and test your anti-freeze before you install it.
The two one gallon containers that I purchased from Walmart proved to be unusable after specified amount of water was added. Freeze temperature measured 0 deg. F. A sample was put in 0 deg. freezer and sure enough it froze.
If it had not been tested with a Prestone temp. testing gage, the engine would be in danger of cracking as ice froze in cold weather.
It's possible that containers were mislabeled and product was actually pre-mix, not Concentrated. Haven't been able to make contact with Prestone.
Third picture shows freeze level after distilled water was added

 

[FowVay]

Post up a picture of your container please.

 

[Sayjac]

Concentrated 100% AF will freeze between 0 and -5F.

If it was really 50/50 premix, freeze point would/should be ~-34F

 

[kschachn]

How firm was the frozen mixture? Glycols (even mixtures) don’t have much of a defined freezing point.

Can you post a picture please.

 

[Nukeman7]

Concentrated 100% AF will freeze between 0 and -5F.

If it was really 50/50 premix, freeze point would/should be ~-34F

I think you missed this part of the OP's post.

Be sure and test your anti-freeze before you install it.
The two one gallon containers that I purchased from Walmart proved to be unusable after specified amount of water was added. Freeze temperature measured 0 deg. F. A sample was put in 0 deg. freezer and sure enough it froze.
If it had not been tested with a Prestone temp. testing gage, the engine would be in danger of cracking as ice froze in cold weather.
It's possible that containers were mislabeled and product was actually pre-mix, not Concentrated. Haven't been able to make contact with Prestone

 

[Leo99]

If it was premixed coolant and you diluted in half, the freeze point would be right around 0°F.

 

[Sayjac]

I think you missed this part of the OP's post.

Possible I misinterpreted.

That said, freeze points noted are accurate. Guess I would check the 'labeled' concentrate for concentration using a hydrometer, that would identify premix or concentrate.

 

[Proton Dave]

Post up a picture of your container please.

Done

 

[Proton Dave]

If it was premixed coolant and you diluted in half, the freeze point would be right around 0°F.

EXACTLY

 

[FowVay]

Drop a note off to Prestone and explain the situation. At the very least, they owe you a refund.

 

[kschachn]

Drop a note off to Prestone and explain the situation. At the very least, they owe you a refund.

Definitely. Make sure you retain the lot numbers from the container.

I'm assuming the foil seal shown in your picture was intact upon opening?

 

[Rand]

yikes.. I'm not a fan of ultracompatible with every known coolant type.
but it defnitely says mix .78GAL of water to get a 56% antifreeze solution

 

[Proton Dave]

Drop a note off to Prestone and explain the situation. At the very least, they owe you a refund.

sent 2 notes and 2 phone calls. No replies yet. It's beginning to look like that are ignoring the problem.

 

[Proton Dave]

sent 2 notes and 2 phone calls. No replies yet. It's beginning to look like that are ignoring the problem.

 

[kschachn]

So the foil seal was intact when you first opened the container?

 

[Proton Dave]

Drop a note off to Prestone and explain the situation. At the very least, they owe you a refund.

So the foil seal was intact when you first opened the container?

Yes

 

[kschachn]

Yes

Then keep after them. Hopefully they will respond.

 

[nicholas]

Very strange indeed

 

[Warstud]

Now you know how they can sell it so cheap