Coolant for '94 Jag XJS

[cadfaeltex]

Got a 1994 Jag XJS about three weeks ago. It's got the 4.0L AJ6 straight six in it. I'm going to do a full fluid change out this weekend (I hope) and coolant is on the list. It has been running at a good temperature (only slightly going above the center of dial when I do stop in go over 90 degrees). However, I know the radiator design isn't the greatest and many do have overheating problems.

Was going to go with Prestone pre-mixed but is there a better choice? Saw some recommendations on a Jag forum (though from a year or two ago) to run Evans Waterless.

What would be my best coolant choice?

 

[chad8]

I would go with prestone long life. better technology and protection. green is fine. I doubt they knew about oat or hoat coolants back then.

 

[Dan55]

I would use G-05 AKA Motorcraft Premium Gold http://www.valvoline.com/pdf/Zerex_CoolantChart.pdf

 

[Trav]

This engine has a Nikasil block with wet liners?
John Deere Coolguard works well in these wet liner types of engines and is a long life coolant.
I get the Coolguard at the local Deere dealer for about the same price as other coolants, it is non 2EHA.

Whatever you buy get full strength and mix it with distilled water, you save a bundle over the pre mix.

http://www.deere.com/en_US/parts/partsinfo/coolants/coolants_competitive_comparisons.html