Hi Guys, my Mazda 3 Skyactiv is now 10 years old and according to the owner's manual the radiator coolant should be changed at 200,000 km or 10 years. Mileage wise, I'm only at 105,000 km.

Is it really necessary to change the coolant at 10 years? This requires flushing the radiator and putting in Mazda long life coolant. I'm thinking of letting go of my car in another 2-3 years. I know many owners of cars older than 10 years don't bother to change the coolant and they are still driving happily.

Appreciate some advice here. Thanks guys.