[alexandru79]

i want to change the coolant.car have 130000km and i think that previous owners never change coolant .i found  in shops valeo,prestone and some others.can someone tell me who's the best for i30 petrol motor

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[Asterix]

The brand isn't important, but make sure to use the right type (color) if you mix them they'll not work as intended.

[CraigB]

 

It's critical you don't mix different coolants, will be detrimental to the system.

Type used is also critical, Hyundai servicing mentioned at my last service that coolant will need replacing at the 5 year service, even though the coolant that is used is rated for 10 years they replace it at 5 to prevent lubricating issues.

[alexandru79]

thanks.i used prestone and i'm very pleased .no problems at all.color green of course,after reading a lot on internet,i understand that all manufactures uses ethylene glycol  for antifreeze function and the difference is that in asia they put phosphates against rust and in s.u.a they use other substances .

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