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If the prestone and other universals didn't mix with other antifreezes don't you think there would be mass law suits in the media by now from destroyed engines



Whenever I check someone elses coolant level and discover the fluid is a brown color with slime lining the reservoir, I know they have used a non original replacement. I fell into this trap myself when I changed the water pump on the wife's '05 T&C and used prestone universal to replace the lost fluid. Over the course of about six months the fluid changed to a brown color and became lumpy and slimy. I flushed the system and refilled from scratch with some overpriced coolant purchased from the dealer. I suppose this doesn't mean an incompatability issue has occured by mixing of fluids as long as they do their jobs. Maybe it's only aesthetics.