In a 2010 Mazda3, oil capacity depends on the engine option. The base 2.0-liter unit takes about 4.4 quarts (roughly 4.2 liters) of engine oil with the filter, while the larger 2.5-liter engine requires about 4.8 quarts (roughly 4.6 liters). Always verify with the owner's manual and check the dipstick after filling.
Engine options and oil capacity
The 2010 Mazda3 offered two inline-four engines in most markets. Oil capacity varies by engine and whether the filter is replaced during an oil change. Below are the typical factory specs for the US-market 2010 Mazda3.
2.0-liter MZR-FE engine
For the 2.0L engine, the oil capacity with a new filter is about 4.4 quarts (4.2 liters). Use the recommended viscosity (commonly 5W-20) and a quality engine oil meeting or exceeding API SN or newer.
2.5-liter MZR engine
For the 2.5L engine, the oil capacity with a new filter is about 4.8 quarts (4.6 liters). Follow Mazda's guidance on oil grade (typically 5W-20 in many climates) and ensure you reset maintenance reminders after the change.
Notes on oil type, maintenance intervals, and verification
Oil grade and capacity can vary by market and the exact model year. Always confirm you are using the correct viscosity for your climate and driving conditions by consulting the owner's manual or a Mazda dealer. Regular oil changes help protect the engine and maintain performance.
Summary
For a 2010 Mazda3, engine oil capacity depends on the engine: about 4.4 quarts (4.2 liters) for the 2.0-liter, and about 4.8 quarts (4.6 liters) for the 2.5-liter, both with a new filter. Verify the exact specification in the owner's manual for your vehicle and ensure you use the recommended 5W-20 oil in most climates.