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4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

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Old 12-16-2014, 02:54 PM   #1
Mustang_Don's Avatar
Join Date: Aug 2013
Vehicle: 2003 Mustang GT
Location: TX
Posts: 11
Question "New" Prestone 50/50 prediluted coolant

I'm not sure if this is the right place to post this question, and it may have already been answered as I didn't take the time to do a thorough search.
Does anyone know if the "New" Prestone 50/50 prediluted coolant is OK to use in our Mustang GTs with aluminum heads or blocks/heads? I've used it to top off the existing coolant after replacing the upper radiator hose, but I'm not sure if it's 'good' for aluminum. The container states:
  • For ANY car or light duty truck
  • Works with ANY color antifreeze
  • Will NOT void warranty
  • Up to 5 years or 150,000 miles of protection
The container also states that it meets or exceeds ASTM D3306 & ASTM D4985, but that doesn't mean anything to me. There's nothing on the label that specifically states anything about its compatibility with aluminum.
Any enlightenment on the subject will be appreciated.
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Old 12-16-2014, 03:07 PM   #2
Mustang_Don's Avatar
Join Date: Aug 2013
Vehicle: 2003 Mustang GT
Location: TX
Posts: 11

Looks like I just found the answer to my own question - guess I should have gone to the Prestone site to start with.

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Old 12-16-2014, 04:02 PM   #3
2nd Gear Member
Join Date: Sep 2012
Vehicle: 2014 Ford Mustang
Location: California
Posts: 430

Glad you found your answer, But another answer is that when I needed new coolant (oil cooler install) I just went to Ford and got what they recommended. It may have cost more but to me it was worth it to make sure nothing is going to damage to my engine.
Funniest post Ive ever seen...
Waitwaitwaitwait! Y'all are complaining the new Mustang has a touch of Aston Martin in the design? That's like saying I like such and such girl but she looks a bit like Emma Watson.
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Old 12-16-2014, 04:02 PM
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