---
slug: paccar-mx13-oil-capacity
title: "PACCAR MX-13 Oil Capacity"
description: "PACCAR gives the MX-13 oil system capacity as 42 U.S. quarts on its EPA 2024 spec sheet, with an oil and filter interval that depends on idle time and duty."
track: maintenance
kind: article
isRegulatoryAdjacent: false
publishedAt: 2026-10-19
source: https://shopbluecollarparts.com/kb/paccar-mx13-oil-capacity
license: CC BY 4.0
---

# PACCAR MX-13 Oil Capacity

**PACCAR's MX-13 EPA 2024 specification sheet gives the oil system capacity as "42 U.S. QTS."** The sheet does not break that figure down by oil pan. Confirm the capacity for the specific engine in the MX engine operator's manual before filling.

## The figure and where it comes from

The *MX-13 EPA 2024* specification sheet from PACCAR (form 2024MX13SPEC), published on [peterbilt.com](https://www.peterbilt.com/static-assets/documents/resources/EPA-MX-13-Spec-Sheet_2024_English.pdf), lists "OIL SYSTEM CAPACITY 42 U.S. QTS." It applies to the EPA 2024 MX-13. An MX-13 certified to another emissions year has its own documentation.

## How often is the oil changed on an MX-13?

The same sheet gives the oil and filter interval in miles (and kilometers) by duty:

- Normal/Line Haul, under 20% idle time: 75,000 (120,000 km)
- Normal/Line Haul, over 20% idle time: 50,000 (80,000 km)
- Severe/Vocational Duty: 30,000 (48,000 km)

Idle time is part of how the sheet picks the interval, so a truck that idles a lot falls into a shorter one even on line haul. The sheet says to "Reference MX Engine Operators Manual for engine maintenance requirements."

## Confirm it for your engine

Confirm the capacity, the oil specification and the interval for the engine's serial number and build in the MX engine operator's manual, or with a PACCAR engine dealer.

## What should the service record show?

An MX-13 oil service record should show:

- the date and the mileage or hours;
- the duty and idle-time category the interval was based on;
- the oil grade and the quantity added;
- the filter part number;
- the condition of the oil and filter that came out.

## Log the oil service in Blue Collar Parts

The 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.

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*This page states manufacturer specifications and is not a service manual. Confirm every figure for your engine's serial number and build against PACCAR's current service documentation before servicing it. Preventive maintenance is not a federal annual inspection and does not establish regulatory compliance.*

## Sources

What BCP does here: 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