I just finished flushing the coolant system and need to top it back up but I'm not sure which coolant i should use. Any recommendations?

 

You are in Canada...
I do not know, if coolants in CA are different to those in AUS (Australia).
My answer for the Australian market is:
Not the green coolant.
Standard would be the red coolant.
However, since a few years, there brought here something new onto the market: Yellow coolant. It's called "Nulon ONE".
I believe that it is superior to the red coolant, plus it is supposed to last longer.
I use Nulon ONE.

 

What ever you do bo not mix the long life anti-freeze with the normal anti freeze.
If you do it will congeal into a gel in the system and not work at all well!

 

It's just plain old Dex-Cool. You can get it anywhere. Forget going by the color. Any anti-Freeze can be made in any color. Use the spec's for your car.
Do you have them?
.
.
.

 

From decades ago.

 

Even though I have done it a couple times already I always like to look on the coolant specs on the back of the jug and see if it meets the Ford specs for our cars. Sometimes it will not show the Jaguar specs. as club said above the aftermarket colors don't mean much anymore. Dexcool branded coolant is a positive match for sure.

 

Dex cool is what I've always used. I have an 01 V6 with green coolant and it definitely runs hotter then my 02 V8 with Dex cool. Will be flushing it for Dex one of these years if I ever get around to it.

 

As I wrote above, my advise is for Australia, as I have not got the foggiest, what coolant products there are in other countries, and if they comply to the same logic used in AUS....
In AUS it is VERY IMPORTANT what colour you use, because the colour defines the spec!
The red coolant for example is specifically for aluminium radiators - the yellow ONE is too, but the green one does not seem to be.
More specifically: The coolant spec for Jaguar S-Type coolant is the FORD spec WSS-M97B44-D.
The green Nulon does not meet that, but the red and yellow do. For more details, go to:

https://www.nulon.com.au/products/cooling-system

And choose your poison... ...for more details. I.e. click on any of the products, then scroll down to find the specifications (its written in white on black background). There you will find WSS-M97B44-D. listed under red and under yellow, but not under green.

Thus, to find your right coolant, look for spec compliance WSS-M97B44-D on the products in your country.

Also, I would always go for concentrate and mix it myself to my liking with demineralised water. That way you can define its properties yourself, plus it works out much cheaper, because if you buy pre-mixed, you pay for packaging and transport of water.

And about the "demineralised water": You can either buy it, or - what I do: I use the water, which my dehumidifier produces: Water sucked out of the air....

 

I too like to buy concentrate and make my own mix. Here where i live freezing is basically non-existant. I like a 30% to 35% mix. Keeps boil over at about 245. If it gets to that what good is 260 boilover anyway. More water means better heat transfer anyway. I also run a water wetter. I think it helps a lot. It can top 110F here and with ac at max and idling 212F is the highest i have ever seen. I also have an external trans fluid cooler mounted behind the grill. It makes a huge difference. A plate style used for tow applications. I wish i could have the cooling fan come on max at 180F or whenever ac is on. I have read that is possible by a write over in the ecm.

 

Stop making this complicated.
Use what's called for and that's Dex-Cool.
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I wish it were simple. In an attempt to summarize as clearly as possible what others have stated:

Per Jaguar TSB S100-06 that Bob posted, for the 2000-on model year S-Type, the coolant specification is Ford WSS-M97B44-D.

The Ford WSS-M97B44-D specification describes an Organic Acid/Additive Technology (OAT) "Extended Life" antifreeze.

The most commonly-available product in the U.S. that meets this spec is Dex-Cool, a trademarked brand name owned by General Motors. Dex-Cool is offered by Zerex, Prestone, ACDelco, Shell, Peak, Havoline and other third-party antifreeze makers.

Jaguar has never approved or recommended the use of Dex-Cool, or listed it in its Driver's Handbooks, Owner's Manuals, Vehicle Specifications Booklets or Technical Service Bulletins. But Dex-Cool is the most commonly-available brand that meets the Ford spec and has been used by thousands of Jaguar owners for decades.

Dex-Cool is typically orange in color, but some brands may appear pink or red.

Another suitable product is Ford Motorcraft WSS-M97B44-D Orange Extended Life Antifreeze/Coolant, available from most Ford dealers.

According to Jaguar and other automakers, OAT antifreeze must never be mixed with conventional green (Inorganic Additive Technology (IAT)) antifreeze, Hybrid Organic Acid/Additive Technology (HOAT), or any of the Phosphate or Nitrite variants (P-OAT, P-HOAT, P-IAT, N-OAT, N-HOAT, etc.). The reasons include adverse reactions between additives that shorten their lives and reduce/negate their effectiveness (additives include corrosion inhibitors, electrolysis protection, cavitation protection, pH buffers, specific protectors for aluminum, brass, copper, iron, etc.), and the formation of gels or solid precipitates that can coat the entire cooling system, reducing its thermal efficiency, and obstruct the heater core and other small passages.

As clubairth1 stated, we cannot select an antifreeze based on color alone. We must confirm the chemistry specifications.

Cheers,

Don

 

> According to Jaguar and other automakers, OAT antifreeze must never be mixed with conventional green (Inorganic Additive Technology (IAT)) antifreeze.

Yes, I was sure that you cannot mix them. When researching a bit about that topic a few days ago, I actually did find the info that you can top up with a different colour. This however would be wrong information. It shows again that you can't believe everything you read on the net...

 

My favorite quote on this topic is:

"Don't believe everything you read on the Internet." --Abraham Lincoln

In some instances it may be perfectly acceptable to top up with a different colored coolant, but we must be absolutely certain about the chemical compatability. Coolant manufacturers do not make this easy to determine, especially those who offer so-called "universal" coolants.

There is a common misconception that it is acceptable to use any antifreeze we want as long as we first completely flush the cooling system. This may not be true. A critical factor that auto manufacturers take into account when specifying antifreeze is compatability with the specific metals, rubbers and plastics used in the vehicle's cooling system. Ignoring a manufacturer's specification may lead to accelerated deterioration of cooling system components, including the coolant passages inside the engine block and cylinder head, which cannot be repaired. The bottom line is that we can't choose a coolant simply based on marketing claims or what we think to be "newest" or "best."

Cheers,

Don

 

Or as the great Marcus Aurelius (who was not only one of the 5 good Emperors of Rome, but also a philosopher) said:

Non creditis quae legitur in Internet.
...which is Latin for "Don't believe everything you read on the Internet".