The 2012 Mazda3 SKYACTIV uses 0W-20 synthetic motor oil.
Mazda specifies a low-viscosity 0W-20 oil to maximize efficiency in the SKYACTIV-G engine. Use a full-synthetic 0W-20 that meets ILSAC GF-5 or API SN specifications, and Mazda recommends Mazda Genuine 0W-20 or an equivalent that meets those standards for best results.
Oil grade and specifications
The SKYACTIV-G engine is designed around 0W-20 lubrication. Acceptable options must meet ILSAC GF-5 (or API SN) specifications. Mazda Genuine 0W-20 is recommended, but any oil meeting the same specs is acceptable.
Why the 0W-20 grade matters
Low-viscosity oils reduce friction and improve fuel economy, which is part of Mazda’s SKYACTIV design philosophy. This helps with cold starts and overall efficiency without sacrificing protection once the oil is warm.
Oil capacity and service guidance
The engine oil capacity for the 2012 Mazda3 SKYACTIV-G is roughly 3.7 quarts (about 3.5 liters) when replacing the filter. Always verify the exact capacity in the owner's manual or on the under-hood label, as variations can occur by engine variant or market.
Maintenance intervals
Follow Mazda's recommended oil-change intervals for your climate and driving conditions. In general, synthetic 0W-20 changes are commonly suggested around 5,000–7,500 miles (8,000–12,000 km) under normal conditions, and more frequently under severe service. Consult the owner’s manual for the precise schedule.
Summary
In brief, the 2012 Mazda3 SKYACTIV requires 0W-20 synthetic motor oil meeting ILSAC GF-5/API SN, with an approximate capacity of 3.7 quarts. Use Mazda-approved oil or an equivalent that meets the same specifications, and follow the official maintenance schedule to maintain performance and efficiency.