This page lists 11 cooling system parts for the 2020 Freightliner FL, across 1 part type, 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). Every part shows its brand, manufacturer part number and fitment notes.
On the 2020 Freightliner FL, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. Every listed part is Coolant / Antifreeze.
The 2020 Freightliner FL was sold with 7 engines. All 11 parts on this page fit every engine.
3 brands supply cooling system parts for the 2020 Freightliner FL, led by PRESTONE (7 parts), PEAK (2 parts) and VALVOLINE (2 parts). Quality grades include Heavy Duty, Premium and Compatible With All Colors.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2020 Freightliner FL. 3 parts have it, including PRESTONE AF3100 (Coolant / Antifreeze) and PRESTONE AF2100 (Coolant / Antifreeze). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2020 FL engines | AF3055 | 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2020 FL engines | AF3100 | 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: all 2020 FL engines | FCA1GAL | 🇲🇽 MX | Fleet Charge1 Gallon | View on Amazon |
| PEAK Fits: all 2020 FL engines | FXA1GAL | 🇲🇽 MX | Final Charge Global1 Gallon | View on Amazon |
| PRESTONE Fits: all 2020 FL engines | AFC10000 | 🇲🇽 MX | Command ESi PrechargedPurple | View on Amazon |
| PRESTONE Fits: all 2020 FL engines | AFC13000 | 🇲🇽 MX | Command COR-Guard Nitrite Free-Noat Extended Life CoolantRed | View on Amazon |
| PRESTONE Fits: all 2020 FL engines | AFC12100 | 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
| VALVOLINE Fits: all 2020 FL engines | 846439 | 🇲🇽 MX | HD Nitrite Free Extended Life Yellow1 Gallon | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2020 FL engines | AF2100 | 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE Fits: all 2020 FL engines | AFMAX | 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 2020 FL engines | 861399 | 🇲🇽 MX | G40 Pink1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
11 Coolant / Antifreeze parts are listed for the 2020 Freightliner FL, from PRESTONE, PEAK and VALVOLINE. PRESTONE AF3100 carries the "Popular" badge. All of them fit every engine offered in the 2020 FL.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, PRESTONE supplies 1 part: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Heavy Duty section lists 6 options from PRESTONE, PEAK and VALVOLINE — rated for severe service. PEAK FCA1GAL is listed in this group.
The Premium section lists 2 options from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 1 option from VALVOLINE — built to original-equipment specification. VALVOLINE 861399 is listed in this group.
Buying Cooling System Parts for a 2020 Freightliner FL
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- You do not need to pick an engine: every cooling system part on this page fits 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).
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze .
Frequently Asked Questions
How many cooling system parts fit the 2020 Freightliner FL?
Our catalog currently lists 11 cooling system parts for the 2020 Freightliner FL across 1 subcategory 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 cooling system parts differ between 2020 Freightliner FL engines?
No. On this page every cooling system part fits 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). You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of cooling system problems on a 2020 Freightliner FL?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
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?
Every part on this page already fits 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). Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2020 Freightliner FL
Cooling System Parts for Other Freightliner FL Years
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