Complete Oil Specifications
Your 2021 Mazda 3 2.5L Skyactiv-G (Non-Turbo) requires 0W-20 full synthetic oil.
Quick Reference
| Specification | Value |
|---|---|
| Viscosity | 0W-20 |
| Standard | API SP / ILSAC GF-6A |
| Capacity (with filter) | 4.8 quarts |
| Oil Filter | Mazda 1WPE-14-302 |
| Normal Interval | 10000 miles or 1 year |
Why 0W-20 with High Moly is Recommended
Mazda Skyactiv engines are designed with very tight tolerances and high compression ratios. Mazda’s factory oil (manufactured by Idemitsu) contains high levels of Molybdenum (Moly), a friction reducer. While any API SP 0W-20 oil is safe, using a high-moly oil (like Mazda Genuine or Idemitsu) smooths idle and slightly improves fuel economy.
Mazda-Approved Oil Brands
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✅ Mazda Genuine Oil 0W-20 with Moly
-
✅ Idemitsu 0W-20 Advanced Moly
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✅ Castrol EDGE 0W-20
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✅ Valvoline Advanced Full Synthetic 0W-20
-
✅ Pennzoil Platinum 0W-20
Severe Service Check
Change your oil every 5000 miles or 6 months if you:
- Drive in stop-and-go traffic (very common)
- Drive in extremely hot or cold conditions
- Drive on dusty or muddy roads
- Take frequent short trips
Installation Details
Drain Plug Torque: 25 ft-lbs
Replace the aluminum crush washer at every change.
OEM Filter: Mazda 1WPE-14-302
Aftermarket Filters:
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WIX 57002
-
Fram XG6607
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K&N HP-1008
Pro Tip: The oil filter is easily accessible from underneath. Lubricate the gasket, spin on until it touches the base, then tighten 3/4 to 1 full turn. Do not overtighten with a wrench.
FAQs
What oil does a 2021 Mazda 3 take?
SAE 0W-20 full synthetic oil. For the 2.5L Turbo model, 5W-30 is recommended. This page covers the non-turbo 2.5L.
How many quarts of oil does a Mazda 3 need?
4.8 quarts (4.5 liters).
Can I use 5W-20?
Mazda strongly recommends 0W-20 for the Skyactiv-G engine. 5W-20 is not listed as a primary alternative in the US manual for this model year.
How often should I change the oil?
Every 10000 miles or 1 year under normal conditions. However, most drivers fall under “Severe” conditions (5,000 miles / 6 months).
Need these specs on your phone? Download OilFinderPro app for offline access and oil change reminders.
Last verified: 2026-02-23 | Source: Needs OEM source confirmation (manual/spec page URL pending).