I dont think you can mix different coolants. Drain the lot and refill. Maybe look for leaks first though.
Keep the leftover and stick to one brand.
Im in the same situation and have been doing research this week.
Its cheap and easier enough.
Ok well thats handy to know.
I still try not to mix different fluids of any type on any machine. Definately cant go wrong that way.
I agree - heard of strange reactions with brand mixing. Cheers.
Any coolant compatible with aluminum block engines will be identified as a "DEX" product.
If it includes the reference to "DEX", you are good to go. Other well meaning references are irrelevant regardless of the vociferous exclamations of their sponsors.
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I would not use Dex-cool antifreezes in an FZ1 ..... I would stay with the recommended ethylene glycol based products which are fine for aluminum block engines. Part of the controversy with OAT products is that they contain plasticizers which can cause gaskets to leak, I'd pass on any "DEX" type antifreezes. GM denies any problems, but I would not fool around with it. There have been MANY class action lawsuits against GM for damage caused by this product, but since GM went into bankruptcy these lawsuits went into limbo. No thank you.