Mazda 6 Oil Change Interval

[Steve]

Hi Oil Dr,

I have a 2023 Mazda 6 with a 2.5L gasoline engine. The factory-recommended oil change interval is 20,000 km, but I often read that these figures are overestimated. Once I reached 100,000 km, I started changing the oil every 10,000 km. This has essentially doubled my maintenance costs.

Did I make the right decision, or is the positive impact negligible?

Thanks!
Steve

 

[Car Doctor]

Hi Steve,

That's absolutely true—your maintenance costs nearly double, and environmental impact also increases.

A 20,000 km oil change interval isn’t necessarily a bad thing for a gasoline engine. If the car operates under near-ideal conditions (mostly long trips rather than short ones), it can be maintained with high-quality oil. However, if the car frequently takes short trips and doesn’t fully warm up, there’s still no strong reason to reduce the interval below 15,000 km. This way, costs remain more reasonable.

Best regards,
Oil Doctor

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