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View Full Version : Correct pH for Gold Ford antifreeze ??


Thomas C Potter
06-11-2007, 02:26 PM
I thought the shop manual might say, but nooo.

TP Blue 03
MitchB
06-11-2007, 02:34 PM
Do you have an accurate way to check this? I do and new conventional antifreeze (Prestone) out of the bottle, diluted 50/50 gives ~8.2-8.3 pH.

Mitch
GordonB
06-11-2007, 08:37 PM
Question to you all:
Why wouldn't we wnat our anti-freeze 7.0 as in PH Neutral? Any reason it is slightly alkaline right out of the jug? Or do they make it that way to counteract normal acid in the engine? Just wondering.
GordonB
MitchB
06-11-2007, 08:59 PM
Question to you all:
Why wouldn't we wnat our anti-freeze 7.0 as in PH Neutral? Any reason it is slightly alkaline right out of the jug? Or do they make it that way to counteract normal acid in the engine? Just wondering.
GordonB

As ethylene glycol (or any of the alternative glycols) degrades over time - due to a number of different factors, it becomes more acidic. So a reserve alkalinity is built-in.

Mitch
MENINBLK
06-11-2007, 09:36 PM
Here is an excellent article on Coolant and it covers pH.
http://www.eutechinst.com/techtips/tech-tips10.htm
whd507
06-12-2007, 08:16 PM
why do some have gold antifreeze, and some green? If I understand it correctly, the gold has greatly reduced silicates, and the green is normal extended life. why wouldnt all Marauders have the same coolant?
Thomas C Potter
06-20-2007, 11:47 AM
Interesting, that article says 9.5 - 10 is ideal. Mine is 7.5 using a test strip. Has anyone else measured their gold af?? But I'm not convinced that article includes OAT's.

TP
MENINBLK
06-20-2007, 12:06 PM
The only way to know for sure is to take a fresh bottle and dip it.

I have also sent an email to Prestone.
Let's see how they respond.
Thomas C Potter
06-20-2007, 12:21 PM
Thnx Meninblk. I found another article that says 6.6 - 10.1 is good for normal af (does this includes Ford Gold??), Dexcool junk is good at 6.5 -9.0. I'll call dealer and see what high quality info I get.
Thomas C Potter
06-20-2007, 12:34 PM
Dealer says 7.2, but did not supply a range. But at least he knew that much !!!
RF Overlord
06-20-2007, 01:34 PM
But I'm not convinced that article includes OAT's.The Ford Gold coolant is actually BASF Glysantin, which is also sold here as Zerex G-05 and is a HOAT fluid. According to the PDS on Valvoline's web site, the pH of G-05 is spec'd as 7.5-11.0, with typical numbers around 8.
MENINBLK
06-21-2007, 09:08 PM
Okay...

Drum Roll Please !!!!

Here is the **OFFICIAL*** word from Prestone !!!


Thank you for your inquiry. The pH level in Prestone Dex-cool and Prestone All Makes All Models antifreeze
is 8.6 in a 33% by volume solution and at 50% volume solution the pH is 8.7.
If you have any other questions please contact us back either by email or phone.
Our number is 1 (800) 890-2075 and we are opt. 4



Thank you,

Prestone