Follow the manufacturer's instructions. I'm familiar with Volvo's. Volvo sells two very different coolant. Green and orange. The color is not important but the chemical composition is. They cannot be mixed and you can never flush an engine well enough to switch from the green (older formulation) to the orange.
Some engine manufacturers are not as picky as Volvo but if you want to prolong your engine's life and eliminate coolant caused issues, find out what the manufacturer specifies and us this and only this. Carry spare coolant so you don't have to settle for something that may not be compatible.
Yes, you can save a few dollars, but that engine might cost $25K or more. Want to risk it?
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