2003 Mazda 6 Engine Oil Type, Capacity & Service Interval
Oil Type: 5W-30 · Capacity: 4.6 Quarts · Change Every 5,000 Miles
Engine
3L 6-Cylinder
Recommended Oil Type
5W-30
Viscosity grade
Oil Capacity
4.6 quarts
Including filter
Change Interval
5,000 miles
Or 6 months
Oil Filter
Fram PH6607A
Compatible part number
Engine Size
3L
6 Cylinders
Fuel Type
Gasoline
Manufacturer specified
The 2003 Mazda 6 requires 5W-30 engine oil with a capacity of 4.6 quarts (including filter). The recommended oil change interval is every 5,000 miles or 6 months, whichever comes first. The compatible oil filter is Fram PH6607A. Estimated oil change cost at a US service center ranges from $40 to $85.
2003 Mazda 6 Recommended Oil Type & Formulation
For the 2003 Mazda 6, the manufacturer recommends 5W-30 full synthetic engine oil. Using the correct viscosity grade maintains proper lubrication across all operating temperatures and ensures your engine meets fuel economy specifications.
Use conventional oil with a viscosity of 5W-30. Synthetic oil is not recommended.
What does 5W-30 mean? The first number (5W) indicates cold-weather viscosity — lower is better for cold starts. The second number (30) indicates viscosity at operating temperature — higher provides more protection under load.
2003 Mazda 6 Oil Change Interval & Maintenance Schedule
5,000
Recommended Miles
6
Recommended Months
Change oil every 6 months or 5000 miles, whichever comes first.
2003 Mazda 6 Oil Change Cost Breakdown
| Service Type | Estimated Cost | Notes |
|---|---|---|
| DIY (Parts Only) | $25–$40 | Oil + filter only |
| Quick Lube Shop | $40–$85 | Jiffy Lube, Valvoline, Firestone |
| Dealership | $85–$125 | OEM parts, manufacturer certified |
Prices vary by location and current oil prices. Always get a quote before service.
DIY Oil Change Tips for the Mazda 6
Performing your own oil change on the 2003 Mazda 6 can save $30–$60 per service. You will need: 4.6 quarts of 5W-30 full synthetic oil, a Fram PH6607A, a drain pan, and a Mazda-compatible oil filter wrench.
Allow the engine to warm up for 2–3 minutes before draining, then cool for 10 minutes. Torque the drain plug to manufacturer spec (typically 18–25 ft-lbs) to prevent leaks. Reset the oil life monitor if equipped after completing the service.
⚠ Reference Only: Always verify specifications with your official owner's manual. Oil specs may vary by trim level and engine variant. Consult a certified mechanic if unsure.
Estimated Change Cost
Similar 2003 Models
Need More Mazda 6 Maintenance Data?
Our technical specs are updated for 2026. If you noticed an error or need specialized engine data for your specific trim, contact our support team.
Request Specification Update