QUOTE(KennyKB @ Jul 27 2025, 09:21 AM)
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.
If you’re keeping the car another 2–3 years or more, I think important than the coolant is to check your radiator hoses. If is harden, just change them as this is what usually leaves people stranded when it crack and leaks.
Since you only drive about 10k km a year, you may not need to touch the coolant but for Mazda FL22 coolant is cheap, around RM150 for a full flush, perhaps a good flush it lasts for another 3–5 years until you sell the car. Do take note that, Fresh coolant also protects your water pump and hoses from sudden overheat and usually for old coolant, although it see have colour but it will be like normal water that loses protection, and makes the engine overheat easier.
I changed mine for peace of mind (car at 250k km, 10 years old) and just continue using it a few more years before deciding on a replacement. At least during usage reduces the risk of failure is reduced.
We may not know when we will be rushing that revving non stop or hill climbing or go for long distance then it overheat. Then is too late bro.
This post has been edited by incredibless: Aug 23 2025, 03:39 PM