verifiedOil capacity guide

Cummins X15 Oil Capacity by Year

X15 oil capacity changes mainly with oil-pan design. Before filling, confirm whether your engine uses the 11.0, 11.5, or 12.0 gallon setup. Use the table and finder below to match the exact year and application before refilling.

Typical fill

44 qt

2018-2026

Range

44-48 qt

with filter

Recommended oil

Cummins CES 20086 / API CK-4

check owner manual

Capacity Finder

Check your year and truck series

Oil capacity with filter

44qt41.6 L

Cummins lists about 41.6 L (11.0 gal) with pan and filter for the rear center sump configuration. Pan style matters more than model year.

Oil Capacity by Year and Application

All numbers below are with a new oil filter.

2018-2026X15 on-highway, rear center sump pan44 qt41.6 LCummins CES 20086 / API CK-4
2018-2026X15 on-highway, stamped steel pan46 qt43.4 LCummins CES 20086 / API CK-4
2018-2026X15 on-highway, wedge-type cast aluminum pan48 qt45.4 LCummins CES 20086 / API CK-4

Who This Covers

This page is for X15 on-highway, rear center sump pan, X15 on-highway, stamped steel pan, X15 on-highway, wedge-type cast aluminum pan 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

Cummins X15 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 Cummins X15 take?

Cummins X15 takes 44-48 qt with a new oil filter. For many applications, 44 qt is the starting point for 2018-2026 X15 on-highway, rear center sump pan.

Does Cummins X15 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 Cummins X15 use?

Cummins X15 commonly uses 15W-40 normal service; 10W-30 where approved. Match the recommended oil shown for your exact row and confirm it against your owner manual or oil cap.

Why do Cummins X15 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

Look up by VIN

Based on Cummins X15 truck maintenance and operation guides, plus International's engine oil capacity bulletin for pan-and-filter service fills.. Check your owner manual before service to confirm the exact vehicle setup.