More than likely, I will stick with Dex-cool in the Mustang unless it becomes a problem down the road.įor any application calling for conventional green you can safely upgrade to Motorcraft gold or Zerex G05 and take advantage of longer service life than conventional green. I put green antifreeze in it when I flushed it out the last time just because I don't trust the Dex-cool in this application. I don't know if the problems with this engine and the 5.0, and 4.3L are caused by the Dex-Cool or bad gasket design or both. I know that there have been three gasket revisions since this engine was developed. Truck currently has about 127,000 miles on it and has the second gasket design installed. I have had the intake manifold gaskets replaced three times, once under warranty and all of these were done within the first 100,000 miles. I have a 98 Chevy K1500 with the 5.7L that I bought new. Makes them now suitable for use in GM and Ford specing DexCool. I'd have confidence using DexCool in the new Ford systems calling for it.Īnd like it or not, the vast majority of universal AF's sold at auto parts stores and WM including store brands and brand names like Peak Long life and Prestone are Dexclones containing 2eha. Joining GM, Ford has decided to go to Dex across it's line up but not back spec older models, which indicates to me they have done their homework. While I understand some distrust of DexCool based on some past GM issues, I believe in systems now engineered for Dex and that include a pressurized recovery tank it will work just fine.
Silicone based gaskets can be affected by 2eha which is what's referred to as a plasticizer. I will say though, the biggest possible issue with DexCool with 2eha being used in non dex spec'd systems is gasket incompatibility.
I plan on using Dex-cool in this car while under warranty and then see if I can use anything else after.Īnd that is certainly your call.
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