the orange GM coolant is called dex-coolant. it has a stopleak additive in it, making not compatible with any motor besides which ones it was designed for. GM sucks at making motors now, as does chrysler and ford, and make motors that have very porous gaskets and seals. the stopleak additive is for sealing the porous gaskets. from my experience, dex-cool or not, gm, chrysler, and ford motors leak like no ones business.
honda has the same blue coolant as nissan. they are interchangable with any normal green coolant or Prime coolant. blue is the coolest color!
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