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As you can see, straight from the jug, the Mazda coolant is resisting both corrosion and freezing better than the Motomaster.
I'd say to change out the coolant, and transmission fluid. DO NOT GET A TRANSMISSION FLUSH!!! Just get a place to change out the transmission filter, and top off the transmission fluid.
Yes I had low coolant in my brand new CX-30 and had to top it off 2-3 times with the FL22 fluid (factory OEM). I think some air is left in the system that gets out over time. Since then no issue with the coolant level
I had my AC condenser replaced and looked at it in the parking lot and confirmed it was full of coolant, drove home, and it was low. I ordered and added some OEM coolant at home. It's been fine ever since
This is normal. Mazda master tech. I work on these everyday. Every oil change they need to be topped off. The coolant evaporates from the bottle pretty quick.
My last vehicle was an RX350 which I had for 14 years with 115,000 miles before trading it in and had zero leaks. I flushed/replaced the coolant at 100,000.
Proton original radiator is of very poor quality. Rust prone. Change it as soon and use premixed Toyota Coolant bought from Toyota Service Center to avoid fakes. Toyota SLLC and an aftermarket radiator will last the remaining lifetime of your Saga.
You're not supposed to add tap water... distilled water is fine for emergencies, but always top up with coolant whenever possible
Mods: None, staying showroom stock. TCL Buyers Guide Negatives / future ownership issues: A) Valley Plate coolant leak: Look for pink crystals (dried coolant) underside of engine near where transmission meets up w engine. Also check upper radiator hose where it connects to radiator. Workaround: 50k/5 year coolant maintenance.
My 2017 CX-9 and it has a coolant leak from the back of the block by the manifold and the shop I took it to said to take it to a dealer.
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In March 2026 on PartReview, antifreeze OEM Toyota were overall better than OEM Mazda.
In March 2026 on PartReview, antifreeze OEM Toyota were overall more popular than OEM Mazda.
By vote balance, antifreeze OEM Toyota surpassed OEM Mazda:
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In March 2026, according to PartReview, antifreeze OEM Mazda and OEM Toyota have not taken top places in car-specific ratings. You can help by adding your review about these manufacturers.
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