Hello, I am going to be changing out my wifes granddaughters 1998 maxima antifreeze. Going to drain the radiator and flush it out with distilled water,etc. I am not going to be touching the block drain plugs. My question is after I am done and ready to refill the radiator and reservoir, do I put in straight antifreeze, or do I put in 50/50. I would think 50/50 in reservoir, but unsure about radiator since there will be some water in it from the block. Thanks for the replys.

 

What's the owner's manual say?

 

Just purchased the car, did not have owners manual.

 

The overall ratio of coolant to H2O should be no greater than 50:50.

If you know the total coolant system capacity you can add H2O then add coolant so that a 50:50 mix is the result.

Aside from that, using a premixed 50:50 product is acceptable.

 

That's what exactly the op asked about.
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