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#4539913 - 10/11/17 08:32 AM Ford Antifreeze Change Interval
ssamaroo01 Online   content


Registered: 08/22/17
Posts: 51
Loc: Mt. Vernon, NY
Why does Ford recommend the first antifreeze change at 100k and then 50k after that? Is there something special about the factory fill? Perhaps an additional additive that makes it last longer? I'm at 73k now and I'm wondering if I should just go ahead and do a drain and fill at my next oci @75k or wait until about 90k. My car uses VC-3 orange.

Also, is it a good practice to replace the thermostat when doing a drain and fill of the cooling system or is it one of those "if it ain't broke, don't fix it" type of parts.
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#4539940 - 10/11/17 08:59 AM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
Char Baby Online   content


Registered: 05/25/05
Posts: 10022
Loc: ROCHESTER, NY
The only things that I can think of for the 100K change is the fact that it was an all brand new cooling system, engine, water pump, radiator etc. And too, that no air has yet entered the system. Now at 100k miles they must feel that enough of the coolant has broken down to warrant a replacement. Other will chime in with more info.
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#4539944 - 10/11/17 09:04 AM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
2015_PSD Offline


Registered: 09/26/10
Posts: 7236
Loc: SE Texas
I had gold in my 2010 and did not change it for 5 years/150K and it was "ok", but I probably should have changed it at 125K. I believe that you are fine to go the full 100K miles.
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#4539950 - 10/11/17 09:09 AM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
RichardS Offline


Registered: 01/14/17
Posts: 621
Loc: Melbourne, Florida
I'm with Char, unless you find a way to completely drain, flush, and refill the system, they're anticipating some of the old coolant will linger, and affect the chemistry of the replacement coolant that you've added.

Or they've picked 100k to limit the necessary services for the first/second owner, thereby reducing cost-of-ownership, but set 50k from there to extend serviceable life of aging parts.
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#4539957 - 10/11/17 09:16 AM Re: Ford Antifreeze Change Interval [Re: RichardS]
Gebo Offline


Registered: 09/18/02
Posts: 2102
Loc: VA
Originally Posted By: RichardS
Or they've picked 100k to limit the necessary services for the first/second owner, thereby reducing cost-of-ownership, but set 50k from there to extend serviceable life of aging parts.

I'm with RichardS. Sorta like lifetime transmission fluid. I'd change at 50.
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#4539996 - 10/11/17 09:51 AM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
Ethan1 Offline


Registered: 12/29/14
Posts: 1632
Loc: 'murica
It's because they don't trust whoever is doing the coolant change to perfectly bleed the system and not allow contaminants in.

It's the same reason that OEMs use snap-head bolts on certain critical applications where techs just aren't likely to use a torque wrench.

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#4540132 - 10/11/17 12:01 PM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
ssamaroo01 Online   content


Registered: 08/22/17
Posts: 51
Loc: Mt. Vernon, NY
Thanks for the advice. I guess I'll wait until 90k when I perform major service to drain and fill the cooling system.
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#4540195 - 10/11/17 01:04 PM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
bigj_16 Offline


Registered: 07/03/17
Posts: 1268
Loc: Douglas County, Colorado
Originally Posted By: ssamaroo01
Why does Ford recommend the first antifreeze change at 100k and then 50k after that? Is there something special about the factory fill? Perhaps an additional additive that makes it last longer? I'm at 73k now and I'm wondering if I should just go ahead and do a drain and fill at my next oci @75k or wait until about 90k. My car uses VC-3 orange.

Also, is it a good practice to replace the thermostat when doing a drain and fill of the cooling system or is it one of those "if it ain't broke, don't fix it" type of parts.

How much have you added over the time you have had it?

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#4540233 - 10/11/17 01:30 PM Re: Ford Antifreeze Change Interval [Re: bigj_16]
ssamaroo01 Online   content


Registered: 08/22/17
Posts: 51
Loc: Mt. Vernon, NY
Originally Posted By: bigj_16
Originally Posted By: ssamaroo01
Why does Ford recommend the first antifreeze change at 100k and then 50k after that? Is there something special about the factory fill? Perhaps an additional additive that makes it last longer? I'm at 73k now and I'm wondering if I should just go ahead and do a drain and fill at my next oci @75k or wait until about 90k. My car uses VC-3 orange.

Also, is it a good practice to replace the thermostat when doing a drain and fill of the cooling system or is it one of those "if it ain't broke, don't fix it" type of parts.

How much have you added over the time you have had it?


I've never added any coolant. It has always been at the right level.
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2000 E-250 4.2L 90k
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#4540236 - 10/11/17 01:32 PM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
Bgallagher Offline


Registered: 04/17/12
Posts: 3159
Loc: Boston, MA
To be honest I usually change my antifreeze 5 years regardless of miles. A simple drain and fill with 50/50 will refresh the lubricants etc. in the cooling system and gives me a peace of mind
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#4540238 - 10/11/17 01:35 PM Re: Ford Antifreeze Change Interval [Re: Bgallagher]
ssamaroo01 Online   content


Registered: 08/22/17
Posts: 51
Loc: Mt. Vernon, NY
Originally Posted By: Bgallagher
To be honest I usually change my antifreeze 5 years regardless of miles. A simple drain and fill with 50/50 will refresh the lubricants etc. in the cooling system and gives me a peace of mind


I do that with my wife's Escape since she only drives about 8k per year. I drive a lot - about 30k per year. I bought my Fusion new in April of 2015 and I am currently at 73k.
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#4540374 - 10/11/17 03:44 PM Re: Ford Antifreeze Change Interval [Re: Bgallagher]
SirTanon Offline


Registered: 06/23/14
Posts: 2158
Loc: Phoenix, Arizona - USA
Originally Posted By: Bgallagher
To be honest I usually change my antifreeze 5 years regardless of miles. A simple drain and fill with 50/50 will refresh the lubricants etc. in the cooling system and gives me a peace of mind


I'd say the 5-years thing would work for a lot of people, but not for everyone, especially when dealing with G-05/Motorcraft Premium Gold, which is rated at 5-years and 100,000 miles. For me, 5 years of driving amounts to roughly 150,000 miles, which would be too long for a standard HOAT like G-05.

Add to that the fact that if you're already at the 5-year/100,000 mile limit for said HOAT, and you only drain-and-fill to replace with fresh stuff, you're not going to get all the old stuff out.. probably leaving about 40-50% of the old stuff.. then the "refreshed" coolant will really only be good for about 2.5-3 years and 50k-60k miles, at most.

If you really want to get another full 5 years and 100,000 miles out of the new fill, then I'd say at least ONE flush will be in order.
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#4540473 - 10/11/17 06:06 PM Re: Ford Antifreeze Change Interval [Re: ssamaroo01]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Forget what they recommend and change it every year.

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#4540678 - 10/11/17 09:00 PM Re: Ford Antifreeze Change Interval [Re: Merkava_4]
2015_PSD Offline


Registered: 09/26/10
Posts: 7236
Loc: SE Texas
Originally Posted By: Merkava_4
Forget what they recommend and change it every year.
Complete waste of time and money.
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#4541282 - 10/12/17 03:18 PM Re: Ford Antifreeze Change Interval [Re: 2015_PSD]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: 2015_PSD
Complete waste of time and money.


What about acid build up that can eat away at your engine's gaskets ? Also, if I see junk sticking to the walls of the overflow bottle, that's another indication the coolant needs changed out.

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