Volvo VNL / D13 Filtration Overview
How Volvo VNL D11/D12/D13 oil, fuel, and air filtration stacks work — including bypass oil filters and FS20313 separators.
Volvo VNL trucks with D11/D12/D13 engines use a layered filtration strategy: primary oil filtration, optional bypass polishing, secondary fuel filtration, and a dedicated air element.
Oil system
- Full-flow: 23151592 or long-life 23658092 (application dependent)
- Bypass: 21707132 on many D11–D13 builds
Fuel system
- Secondary fuel: 23920469 (and late-model 24137737 on 2024+ D13 / Mack MP8)
- Water separator: FS20313 or FS19764 depending on processor
Air system
- Common primary elements: 21715813 and AF26163M (replaces 20411815 on many trucks)
Browse Volvo filters or grab a pre-matched VNL service kit.
Frequently Asked Questions
Why does my Volvo use two oil filters?
Many Volvo diesels use a full-flow filter plus a bypass filter for finer polishing. Kits often pair 23151592 or 23658092 with bypass 21707132.
Does Mack share Volvo filter numbers?
Often yes on shared platforms (MP7/MP8 ↔ D11/D13). Still verify the Mack OEM number before substituting.