Oil Specification by Engine
| Engine | Oil grade | Specification | Capacity (inc. filter) |
|---|---|---|---|
| 2.0 / 2.5 SKYACTIV-G (petrol) | 0W-20 | API SP / ILSAC GF-6 | ~4.5 L |
| 2.2 SKYACTIV-D (diesel) | 0W-30 | ACEA C3 | ~4.2 L |
Mazda SKYACTIV engines use unconventional compression ratios that demand the exact specified viscosity. Capacities are approximate — confirm by VIN.
Not sure which engine you have? The required grade is on the oil filler cap; the engine code is in section D.2 of your V5C.
Recommended Engine Oils
SKYACTIV-G petrol — 0W-20, API SP
Mazda Original Oil Supra 0W-20
Mazda’s genuine 0W-20 (API SP) for high-compression SKYACTIV-G petrol engines.
Any 0W-20 meeting API SP / ILSAC GF-6
Any 0W-20 carrying API SP suits the SKYACTIV-G petrol engines.
SKYACTIV-D diesel — 0W-30, ACEA C3
0W-30 meeting ACEA C3 (SKYACTIV-D)
The SKYACTIV-D diesel needs a low-SAPS 0W-30 (ACEA C3) — e.g. Mazda Original Oil Supra 0W-30.
SKYACTIV-G or SKYACTIV-D: Which Oil Does Your CX-5 Need?
Mazda’s SKYACTIV-G petrol engines run an extremely high compression ratio and are designed around a thin 0W-20 (API SP) for efficiency and cold-start flow. The SKYACTIV-D diesel runs an unusually low compression ratio and uses 0W-30 with low-SAPS (ACEA C3) chemistry to protect the DPF. The two are not interchangeable. Using a thicker oil in the petrol engine erodes the efficiency the high compression provides.
Oil Change Intervals
Mazda uses fixed intervals: typically 12,500 miles or 12 months for SKYACTIV-G petrol (7,500 miles in severe use), and ~12,500 miles for SKYACTIV-D diesel. There is no variable service indicator — track it by date and mileage.
Tip: the long intervals make using the correct 0W-20/0W-30 essential; always fit a new filter with the oil.
Frequently Asked Questions
What engine oil does the Mazda CX-5 take?
The SKYACTIV-G petrol engines use 0W-20 (API SP); the SKYACTIV-D diesel uses 0W-30 (ACEA C3). Check your oil filler cap.
Can I use 5W-30 in my CX-5?
It is not recommended. The high-compression SKYACTIV-G engine is designed for 0W-20; a thicker oil increases friction and reduces fuel economy.
Does the CX-5 diesel use the same oil as the petrol?
No — the SKYACTIV-D diesel uses 0W-30 (ACEA C3), while the SKYACTIV-G petrol uses 0W-20. Match your engine.
How much oil does it take?
Around 4.2–4.7 litres including a filter change, depending on engine; confirm in your handbook.
How we check fitment for this guide
We cross-reference fitment figures against manufacturer specifications and OE-supplier catalogue data where available, and matched to the standard codes that actually govern fit — battery type/group sizes, wiper lengths and fitting types, bulb fitment codes, tyre size markings, and oil specifications. We work by make, model, year, engine, and build date, because a single model can take different parts across its life. Where the right part depends on your exact vehicle, we tell you to confirm by registration or VIN. More on our method →