{
  "slug": "cummins-x15-oil-capacity",
  "title": "Cummins X15 Oil Capacity",
  "description": "Cummins X15 oil change capacity is 36.3 to 43.8 liters (9.6 to 11.6 gal), per Cummins' quick reference guide, with its oil drain and overhead intervals.",
  "track": "maintenance",
  "kind": "article",
  "isRegulatoryAdjacent": false,
  "publishedAt": "2026-10-19",
  "cfr": [],
  "related": [
    "diesel-engine-pm-heavy-trucks",
    "detroit-dd13-dd15-oil-capacity",
    "cummins-b67-oil-capacity",
    "volvo-d13-mack-mp8-oil-capacity",
    "paccar-mx13-oil-capacity",
    "detroit-series-60-valve-adjustment",
    "diesel-engine-oil-and-fluids-maintenance"
  ],
  "topics": [
    "engine"
  ],
  "nextStep": {
    "kind": "start",
    "target": "/start",
    "text": "See how a PM record is sent to your customer"
  },
  "sources": {
    "citations": [],
    "bcpRole": "Blue Collar Parts records the work and sends the report to your customer. It does not perform, certify or approve inspections.",
    "reviewed": "2026-10-19",
    "reviewedEdition": null,
    "reviewedText": "Reviewed 2026-10-19"
  },
  "url": "https://shopbluecollarparts.com/kb/cummins-x15-oil-capacity",
  "markdownUrl": "https://shopbluecollarparts.com/kb/cummins-x15-oil-capacity.md",
  "body": "**Cummins gives the X15's typical oil change capacity, pan and filter, as 36.3 liters (9.6 gal) low and 43.8 liters (11.6 gal) max.** That figure comes from the quick reference guide for 2020 and 2021 X15 efficiency hardware. Confirm it for the specific engine before filling.\n\n## The figure and where it comes from\n\nCummins' *Quick Reference Guide: Truck maintenance and operation, 2020 and 2021 X15 efficiency hardware* (Bulletin 5600512, Rev. 10/24) states:\n\n- \"Typical oil change capacity (pan and filter)\": \"Low 36.3 liters (9.6 gal)\" and \"Max 43.8 liters (11.6 gal)\";\n- in its maintenance notes: \"Typical oil change volume: 36.3–43.8 liters (9.6–11.6 gal).\"\n\nCummins publishes the guide at [mart.cummins.com](https://mart.cummins.com/imagelibrary/data/assetfiles/0064269.pdf). It covers 2020 and 2021 X15 efficiency hardware. An X15 of another model year or build has its own documentation.\n\n## How often is the oil changed on an X15?\n\nThe same guide sets the oil drain interval by duty cycle, measured in fuel economy:\n\n- Severe (3–4.9 mpg): 25,000 miles / 12 months\n- Short haul (5–5.9 mpg): 50,000 miles / 12 months\n- Normal (6–6.9 mpg): 60,000 miles / 12 months\n- Light (7+ mpg): 75,000 miles / 12 months\n\nAcross the same row the guide gives \"500 hours for vocational applications.\" It also attaches other conditions to these figures. An extreme severe duty cycle (under 3 mpg) has a shorter interval, and some extensions depend on the oil, the filter or Cummins' OilGuard program. Read those notes in the guide before setting an interval.\n\n## When is the X15 overhead adjusted?\n\nThe guide lists **overhead adjustment** at \"500,000 miles / 10,000 hours / 60 months\". It gives no clearance value. The adjustment procedure and settings are in Cummins' service documentation for the engine.\n\n## Confirm it for your engine\n\nFor full maintenance detail, the guide refers to the *X15 CM2450 X124B Owner's Manual* (Bulletin 5504581) and *Operation and Maintenance Manual* (Bulletin 5504582). Both are available through [Cummins QuickServe](https://quickserve.cummins.com) or a Cummins dealer. Confirm the capacity and intervals for the engine's serial number and build there.\n\n## What should the service record show?\n\nAn X15 oil service record should show:\n\n- the date and the mileage or hours;\n- the oil grade and the quantity added;\n- the filter part numbers;\n- the duty cycle the interval was based on;\n- the condition of the oil and filter that came out;\n- any oil analysis result from the visit (see [what a diesel oil analysis tells you](/kb/diesel-engine-pm-heavy-trucks)).\n\n## Log the oil service in Blue Collar Parts\n\nThe truck PM form's **Engine Oil & Filter** section records the service and what was found, and the finished visit becomes the record your customer receives.\n\n---\n\n*This page states manufacturer specifications and is not a service manual. Confirm every figure for your engine's serial number and build against Cummins' current service documentation before servicing it. Preventive maintenance is not a federal annual inspection and does not establish regulatory compliance.*",
  "license": "CC BY 4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/"
}