Originally Posted By: Ken2
No compelling reason to use any of the WaterWetter type products with antifreeze. If you were towing heavy and right at the limit of overheating, and everything in the cooling system working as it should, WaterWetter might give a very slight advantage before overheating. Or it might not. I've tried it. No problem and no benefit. Antifreeze already contains surfactants that do much the same job as WaterWetter--promote heat transfer between metal parts and coolant. WaterWetter does more, but antifreeze does that also.
That, and it costs $12 IIRC.
I put it in my cars and if you had some odd antifreeze percentage such as 30% the stuff is designed for 100% water applications.
It sounds good to use but it doesnt really do anything. And Dexcool isnt good anyways.
Same for WW competitors like Hy-perlube, etc.