verifiedOil capacity guide

6.7 Cummins Oil Capacity by Year

Most Ram Heavy Duty trucks with the 6.7L Cummins use 12.0 qt with filter. Oil viscosity and service category vary by model year, emissions package, and cold-weather operation. Use the table and finder below to match the exact year and application before refilling.

Typical fill

12 qt

2007-2018

Range

12 qt

with filter

Recommended oil

API CJ-4 / CK-4 diesel oil; verify Ram manual

check owner manual

Capacity Finder

Check your year and truck series

Oil capacity with filter

12qt11.4 L

Later Ram manuals commonly list 10W-30 for normal service and 5W-40 synthetic for severe operation. Match the oil to temperature and duty cycle.

Oil Capacity by Year and Application

All numbers below are with a new oil filter.

2007-2018Ram 2500 / 3500 with 6.7L Cummins12 qt11.4 LAPI CJ-4 / CK-4 diesel oil; verify Ram manual
2019-2026Ram 2500 / 3500 with 6.7L Cummins12 qt11.4 LMopar MS-10902 / API CK-4 diesel oil

Who This Covers

This page is for Ram 2500 / 3500 with 6.7L Cummins and similar vehicles using the same engine family. Before adding oil, match the exact year and application in the table below.

Why Your Number May Differ

6.7 Cummins oil capacity is not always one fixed number. It can change by model year, vehicle setup, and oil-pan configuration, so use the row that matches your vehicle before refilling.

warningBefore You Fill
Add about 0.5 qt less than the listed capacity first, start the engine briefly, wait a few minutes, then verify with the dipstick and top off gradually. Do not rely on a generic engine answer if your vehicle is a different series, chassis-cab, medium-duty, or special-package configuration.

Common Questions

How many quarts does a 6.7 Cummins take?

6.7 Cummins takes 12 qt with a new oil filter. For many applications, 12 qt is the starting point for 2007-2018 Ram 2500 / 3500 with 6.7L Cummins.

Does 6.7 Cummins oil capacity include the filter?

Yes. The capacity values on this page include a new oil filter, which is the number normally used during a full oil change.

What oil does a 6.7 Cummins use?

6.7 Cummins commonly uses 15W-40 normal service; 5W-40 synthetic for cold or severe service / 10W-30 normal service; 5W-40 synthetic for severe or cold service. Match the recommended oil shown for your exact row and confirm it against your owner manual or oil cap.

Why do 6.7 Cummins oil capacity numbers differ?

Oil capacity can change by model year, vehicle application, oil pan, emissions package, and whether the source is listing a with-filter service fill.

Browse by Year

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More Ways to Check

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Based on Stellantis/Ram owner manual capacity tables for 2500/3500 trucks and Cummins diesel oil specification guidance.. Check your owner manual before service to confirm the exact vehicle setup.