Mack MP7 Engine Oil — Spec, Capacity & Change Interval
The Mack MP7 is a 10.8L mid-range diesel rated 325–425 hp and 1,260–1,560 lb-ft, sharing core architecture with the Volvo D11 under the Volvo Group platform. It requires Mack EOS-4.5 approved oil — a CK-4 based specification — and the most common mistake operators make is running FA-4 oil in it, which is not approved.
Last reviewed: July 2026 · Based on AMSOIL technical data sheets and Mack service documentation
Primary spec: The Mack MP7 requires Mack EOS-4.5 approved oil — a CK-4 based specification, functionally parallel to Volvo VDS-4.5. Run 15W-40 as the primary grade; 5W-40 is available across all three AMSOIL tiers for cold-climate starts. Service fill with filter runs approximately 36 quarts (9 gal / 34 L). FA-4 is not approved for the MP7.
with Filter
Inline-6
CK-4 / EOS-4.5
Alt. Viscosity
What Oil Does the Mack MP7 Take?
The Mack MP7 requires oil meeting Mack EOS-4.5, a CK-4 based specification that runs functionally parallel to Volvo VDS-4.5 under shared Volvo Group engineering. Use 15W-40 as the primary grade. FA-4 is not approved for this engine — EOS-4.5 is built strictly on the CK-4 platform, not FA-4's lower-HTHS chemistry.
The MP7 and the Volvo D11 share the same 10.8L displacement and core block architecture, which is why an EOS-4.5 approved oil is almost always also VDS-4.5 approved and vice versa. Every AMSOIL diesel oil tier — Signature Series Max-Duty, Heavy-Duty Synthetic, and Commercial-Grade — carries Mack EOS-4.5 and EO-O approval across its full viscosity range, including the 5W-40 grade for northern winter starts.
- → Required spec: Mack EOS-4.5 (CK-4 based)
- → Primary grade: 15W-40
- → Cold-climate grade: 5W-40 — approved across all three AMSOIL tiers
- → FA-4: not approved for the MP7
- → EOS-4.5 and VDS-4.5 are functionally parallel — same Volvo Group engineering
⚠ AMSOIL Synthetic Heavy Duty Diesel & Marine Motor Oil (AME) is not an option for the MP7. AME is formulated for engines without exhaust aftertreatment and is explicitly not for use with DPF or SCR systems. Every on-highway MP7 built since 2010 runs a full aftertreatment package (DPF/SCR), which rules AME out — use Heavy-Duty Synthetic (ADP), Signature Series Max-Duty (DME), or Commercial-Grade (SBDF) instead.
Mack MP7 Oil Capacity
The Mack MP7 takes approximately 36 quarts (9 gallons / 34 litres) at a service fill with filter. Mack does not publish a single universal dry-fill or filter-only figure across all MP7 pan and filter configurations, so treat the service-fill number as your planning quantity and confirm the exact total against your engine's service label before a change.
| Fill Type | Quarts | Litres | Gallons | Notes |
|---|---|---|---|---|
| Service Fill with Filter | ~36 qt | ~34 L | ~9 gal | Standard oil change, most MP7 applications |
⚠ Always verify capacity with your engine's service label or Mack Uptime documentation. Pan configuration can vary between highway tractor and vocational MP7 builds. Overfilling causes oil foaming and aeration; underfilling reduces oil pressure margin under sustained high-load pulls.
Mack MP7 Oil Change Interval
Mack's published interval for EOS-4.5 qualified full synthetic oil runs 40,000–50,000 km (roughly 25,000–31,000 mi) in regional-haul duty, or one year — whichever comes first. Vocational and high-idle applications should run the shorter end of that range, confirmed by oil analysis.
(~25,000–31,000 mi)
(24–32K km)
(120,000 km)
⚠ Don't extend drain intervals on a hunch. High-idle time, regional stop-and-go duty, and biodiesel blends above 10–15% all accelerate soot loading and TBN depletion in the MP7's EGR-fed CK-4 oil chemistry faster than mileage alone suggests. Pull a sample before pushing past the OEM interval.
What Is Mack EOS-4.5?
Mack EOS-4.5 is Mack's proprietary oil specification for the MP-series engines, built on the API CK-4 platform and shared functionally with Volvo VDS-4.5 under the Volvo Group's common engineering. It targets soot-related wear and extended-drain durability specific to EGR-equipped mid-range diesels like the MP7.
Soot & EGR Compatibility
Keeps EGR-generated soot suspended independently so it doesn't agglomerate into larger, wear-causing particles as it recirculates through the oil.
Extended Drain Capability
EOS-4.5 approval requires the oil to hold up over Mack's factory-extended service intervals, not just the base CK-4 minimum.
Shear & Oxidation Stability
Resists viscosity breakdown under the sustained high-load, high-temp cycles typical of regional haul and vocational MP7 duty.
Backward Compatibility
EOS-4.5 oils are formulated to also carry the earlier Mack EO-O approval, so a single product covers both spec callouts.
| Spec | Basis | Volvo Equivalent | Approved Viscosities (AMSOIL) |
|---|---|---|---|
| Mack EOS-4.5 | API CK-4 | Volvo VDS-4.5 | 15W-40, 5W-40, 10W-30, 0W-40, 5W-30 |
| Mack EO-O | Earlier CK-4 base spec | Volvo VDS-4 | Same as EOS-4.5 — carried jointly on all AMSOIL diesel tiers |
Best AMSOIL Oil for the Mack MP7
All three AMSOIL diesel oil tiers carry Mack EOS-4.5 and EO-O approval for the MP7. The difference between them is wear protection level and how far you can safely push the drain interval.
- 6× wear protection vs. the DFS 93K222 benchmark
- Mack EOS-4.5 / EO-O approved
- Supports drain intervals up to 75,000 mi with oil analysis
- Best fit for owner-operators maximizing uptime
- 4× wear protection vs. the DFS 93K222 benchmark
- Mack EOS-4.5 / EO-O approved
- Runs the full OEM factory interval
- Strong value upgrade from conventional or blend oils
- Same Mack EOS-4.5 / EO-O approval as the 15W-40
- Broader cold-crank viscosity range for winter starts
- Recommended for northern routes and Canadian winters
- 4× wear protection, full synthetic
Use the AMSOIL heavy-duty lookup to cross-reference your engine make, model, year, and emissions tier.
Use the AMSOIL Heavy-Duty Lookup →AMSOIL Mack MP7 Oil — Which Tier Is Right for You?
Not every truck or budget calls for the same product. AMSOIL makes three diesel oil tiers, and all three carry Mack EOS-4.5 approval for the MP7.
| Product | Protection Level | Drain Interval | Best For |
|---|---|---|---|
| Signature Series Max-Duty 15W-40 (DME) · 5W-40 (DEO) · 0W-40 (DZF) | 6× wear protection — top-tier full synthetic | Up to 75,000 mi with oil analysis | Owner-operators and fleets maximizing uptime |
| Heavy-Duty Synthetic 15W-40 (ADP) · 5W-40 (ADO) | 4× wear protection — full synthetic | OEM interval; extendable with oil analysis | Operators wanting synthetic protection at lower upfront cost |
| Commercial-Grade 15W-40 (SBDF) | 2× wear protection — synthetic blend | OEM interval only | Fleets upgrading from conventional oil |
Always match the oil to the MP7's viscosity requirement and confirm EOS-4.5 approval on the product label before purchase. Use oil analysis when extending intervals beyond OEM recommendations.
Why MP7 Operators Should Run Oil Analysis
The MP7's EGR system routes exhaust soot straight back through the crankcase, so soot loading and TBN depletion — not just mileage — drive when the oil actually needs to change. A basic sample checks the numbers that matter:
- → TBN: remaining acid-neutralizing reserve
- → Soot %: soot loading and viscosity risk from EGR recirculation
- → Wear metals: iron, copper, chromium, aluminum trending over time
- → Coolant contamination: early warning for cooler or gasket problems
Rising iron ppm trending against a flat aluminum reading typically points to cylinder liner or ring wear rather than turbo or bearing wear — a distinction that's invisible without a lab report.
Oil analysis can flag rising soot % or falling TBN before a driver ever notices a symptom.
| KIT17 / KIT417 analysis kit | $25–$40 |
| Early liner/ring wear detection | Major repair avoided |
| Confirmed drain extension | Fewer oil changes |
| EGR soot loading trend | Rebuild risk reduced |
Mack MP7 Engine Oil — Common Questions
From owner-operators, fleet managers, and shop techs running the MP7 across North America.
What oil does the Mack MP7 take?
Mack EOS-4.5 approved oil, a CK-4 based specification. Run 15W-40 as the primary grade, or 5W-40 for cold-climate starts. FA-4 is not approved.
What is the oil capacity of a Mack MP7?
Approximately 36 quarts (9 gallons / 34 litres) at a service fill with filter. Confirm the exact figure against your engine's service label, as pan configuration can vary by application.
How often should you change oil in a Mack MP7?
Mack's factory interval for EOS-4.5 qualified synthetic oil runs 40,000–50,000 km (~25,000–31,000 mi) or one year. AMSOIL Signature Series Max-Duty supports up to 75,000 mi with oil analysis confirmation.
Is FA-4 oil approved for the Mack MP7?
No. EOS-4.5 is built strictly on the CK-4 platform. FA-4's lower HTHS viscosity chemistry is not approved for the MP7 — use CK-4 15W-40 or 5W-40 instead.
Is the Mack MP7 the same engine as the Volvo D11?
Shared architecture — same 10.8L displacement, same Volvo Group engineering. The MP7 and D11 are functionally equivalent engines with Mack and Volvo branding. Oil specs run in parallel: EOS-4.5 (Mack) and VDS-4.5 (Volvo).
What AMSOIL oil is best for a Mack MP7?
AMSOIL Signature Series Max-Duty 15W-40 (DME) for maximum wear protection and extended drain potential, or Heavy-Duty Synthetic 15W-40 (ADP) for full synthetic protection at the OEM interval. Both are EOS-4.5 approved.