Back to 2003 Ram 1500
Help
2003 RAM 1500
5.9L I6 Diesel•4WD•diesel•Cummins•turbo
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor1096Torque276Fluid20DTC1220Battery0Maintenance0Recalls0
Fluid · Engine Oil

Engine Oil

for 2003 Ram 1500 5.9L I6 Diesel · 4WD
Fluid Type
15W-40 diesel oil
Spec: API CI-4 or CJ-4
Capacity
12qt
11.35 L
Drain & Refill
12 qt
11.35 L
Change Interval
5,000 mi
8,045 km

Notes

Cummins 5.9L diesel. Capacity with filter change. 5W-40 synthetic acceptable

Buy on Amazon
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.

Other fluid systems on this vehicle

🔌 Need this data in your app? It's all in the free API →
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years. Spot an error? Use the Help link above — a human reads every report.
Stuck on this repair? Take it to The Diag Desk — ask a master tech about this exact car → real human answer within 24h, never AI
Share:XRedditFBWhatsAppThreadsEmail
⚠ STILL BEHIND THE PAYWALL
The 2003 Ram 1500 repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Ram 1500 — $99 →
Building an app?
Free API access to all this data — 20 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →