7 Engine parts are listed for the 2020 Freightliner FL, in 2 part types, covering all 7 engine options (3.0L L4 DIESEL Turbocharged, 3.9L L4 DIESEL Turbocharged, 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged and more). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2020 Freightliner FL, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. All 7 listed parts are Oil (5 parts) and Oil Filter (2 parts).
The 2020 Freightliner FL was sold with 7 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2020 Freightliner FL engine parts are VALVOLINE (5 parts), DONALDSON (1 part) and WIX (1 part).
Each part number listed for the 2020 Freightliner FL opens a page with every vehicle that part fits.
Oil
Summary: Notes list SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy. Replacement brands in this table include VALVOLINE.
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged, 7.2L L6 DIESEL Turbocharged | 909772 | 🇲🇽 MX | Heavy Duty Full Synthetic SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Heavy Duty / Diesel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged, 7.2L L6 DIESEL Turbocharged | 909778 | 🇲🇽 MX | Heavy Duty Conventional SAE 15W-40 DIESEL1 Gallon | View on Amazon |
Synthetic Blend
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged, 7.2L L6 DIESEL Turbocharged | 909766 | 🇲🇽 MX | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged, 7.2L L6 DIESEL Turbocharged | 909776 | 🇲🇽 MX | Heavy Duty Synthetic Blend SAE 10W-30 DIESEL1 Gallon | View on Amazon |
| VALVOLINE Fits: 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged, 7.2L L6 DIESEL Turbocharged | 909782 | 🇲🇽 MX | Heavy Duty Synthetic Blend SAE 15W-40 DIESEL2.5 Gallon | View on Amazon |
This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable.
VALVOLINE supplies the 5 Oil parts for the 2020 Freightliner FL.
In the Full Synthetic grade, VALVOLINE supplies 1 part: full-synthetic oils. A representative part number is VALVOLINE 909772.
In the Heavy Duty / Diesel grade, VALVOLINE supplies 1 part: grouped under the catalog's "Heavy Duty / Diesel" designation — the notes column spells out what sets them apart. A representative part number is VALVOLINE 909778.
In the Synthetic Blend grade, VALVOLINE supplies 3 parts: synthetic-blend oils. A representative part number is VALVOLINE 909766.
This group includes VALVOLINE 909772, VALVOLINE 909778 and VALVOLINE 909766 and the remaining parts above.
Oil Filter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DONALDSON Fits: 5.1L L4 DIESEL Turbocharged | P580794 | 🇲🇽 MX | Filter - Oil (Primary) | View on Amazon |
| WIX Fits: 6.4L L6 DIESEL Turbocharged | 57214 | 🇲🇽 MX | Cartridge FilterCartridge Lube Metal Free Filter | View on Amazon |
This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive.
2 Oil Filter parts are listed for the 2020 Freightliner FL, from DONALDSON and WIX.
Part numbers include DONALDSON P580794 and WIX 57214.
Buying Engine Parts for a 2020 Freightliner FL
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Match the engine first. Every engine part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil and Oil Filter .
Frequently Asked Questions
How many engine parts fit the 2020 Freightliner FL?
Our catalog currently lists 7 engine parts for the 2020 Freightliner FL across 2 subcategories and 3 brands, covering all 7 engine options (3.0L L4 DIESEL Turbocharged, 3.9L L4 DIESEL Turbocharged, 4.8L L4 DIESEL Turbocharged, 5.1L L4 DIESEL Turbocharged and more). Each part is matched to the engine(s) it fits.
Do engine parts differ between 2020 Freightliner FL engines?
Yes. Every engine part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of engine problems on a 2020 Freightliner FL?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What oil viscosity is listed for the 2020 Freightliner FL?
Oil rows on this page include SAE 10W-30 and SAE 15W-40. Confirm the engine and the weight on the filler cap before you buy — high-mileage and standard fills can differ.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2020 Freightliner FL was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2020 Freightliner FL?
First match the engine — each row shows which engine(s) the part fits. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 Freightliner FL
Engine Parts for Other Freightliner FL Years
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