Heavy-Duty Coolant Filters for Diesel & Commercial Engines
Charged vs. Blank Coolant Filters, & Which One You Need.
Shop AMSOIL Heavy-Duty Coolant Filters // for Diesel and Commercial Engines
Keep your coolant system clean & your engine protected with Donaldson P-Series filters.
If you want to get the most out of your coolant system, a coolant filter can be a valuable addition to your heavy-duty or consumer vehicle. Coolant is one of the most important systems on board, and with clean, pure coolant, your engine can handle tough tasks, heavy pulls, and long driving hours without the risk of heat-related damage or wear. From on-board heavy-duty systems to bypass units, Amsoil is home to some of the best coolant filters in America, proven to work in all four seasons that we get here in Northwest Ohio.
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What is a Coolant Filter?
Coolant filters are like an oil filter, but for your coolant system, and they can trap rust, scale, and casting sand common in these systems. Depending on your specific set-up, your filter may also release supplemental chemical additives into your coolant to better protect your system and hoses against corrosion. Coolant works year-round and keeps your engine safe when clean and pure, but if it is dirty, it can cause heat-transfer issues and increase your engine's overall operating temperature.
How does a Coolant Filters Work?
Coolant filters work much like a bypass oil filter, routing a small but continuous fraction of the coolant through a spin-on filter cartridge mounted in the engine bay. As the fluid is forced through the filter, solid debris, rust, and casting sand are caught in the filter fibre, and clean coolant comes out the other end and is returned to the reservoir. Some filters are also charged and add additives to the cleaned coolant to provide anti-rusting and anti-cavitation properties to better protect the engine.
Our Coolant Filters
We are proud to carry some of the top coolant filter brands in the country at Amsoil. Our Donaldson P-Series Heavy Duty Coolant Filters are designed to reduce engine wear and provide OEM service intervals with increased filtering when compared to OEM and other aftermarket options.
What's Your Choice Of Ride?
We have an AMSOIL product for every vehicle - it's your ride, you decide.
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AMSOIL // Engineered For What You Drive & How You Drive
From daily drivers to diesel haulers, weekend toys to workhorse machines — every engine deserves oil that’s made to handle the way you use it. Share a few details with us, and we’ll match you with the premium AMSOIL products designed to protect your engine and boost performance where it counts.
Frequently Asked Questions
No Dumb Questions, Just Dry Dipsticks
What does charged or blank mean in terms of coolant filters?
Coolant filters come in charged or blank. Charged coolant filters contain chemical additives that replenish the anti-cavitation and anti-corrosion properties found in heavy-duty coolants. Blank coolant filters are designed only to filter particulates from the coolant and will not add any additional chemical additives to your system.
How often do I change my coolant filters?
If you already have a system on your heavy-duty truck or commercial vehicle, then it is best practice to change your coolant filter at the same time as your routine engine oil and filter service. However, if you are installing an aftermarket kit, follow the interval schedule in your kit. Most kits have aggressive intervals starting with 500, 1,000, and 3,000 miles as the normal starting intervals to remove dirt, grime, and debris. Once you hit the third change, you can match your coolant filter change with your oil filter change interval.
Do coolant filters help protect the engine?
Yes, a coolant filter protects vital engine components, including the EGR coolers, oil coolers, and heater cores, to ensure your engine stays safe and operates as expected even during high-intensity or high-pressure operations.
Should I use a charged or non-charged filter?
This depends on the specific coolant you are using in your heavy-duty or commercial engine. If you are using traditional green coolant, look for a charged coolant filter that contains SCA chemical additives. If you are using Extended Life Coolants, consider a non-charged filter, since you do not need to over-concentrate the chemicals and additives already in the coolant.
Do all engines have a built-in coolant filter?
No, not all engines have a built-in coolant filter. However, many heavy-duty commercial diesel engines do include coolant filters as part of their build-out. Other heavy-duty diesel engines, such as older Powerstroke, Duramax and Cummins, do not include coolant filters as a stock part of the engine, but many aftermarket bypass kits are available and can be added to the truck's coolant system with relative ease.
Do consumer cars and SUVs need a coolant filter?
No, the vast majority of consumer cars and SUVs do not need a coolant filter and should instead rely on regular coolant system flushes, as per your owner’s manual, to remove debris, dirt, and other contaminants.
Is regular tap water ok to use as a stopgap for coolants?
This depends on the specific engine, but if you use water as a stopgap, you should generally use distilled water, as it lacks the additives and chemicals in tap water that can leave residue and cause other issues when heated. However, coolant is always better for gas and diesel engines than traditional water.
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Canada
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Manitoba
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Newfoundland and Labrador
St. John's, Mount Pearl, Corner Brook, Conception Bay South, Paradise, Grand Falls-Windsor, Gander, Happy Valley-Goose Bay, Torbay, Portugal Cove-St. Philip's, Labrador City, Stephenville, Carbonear, Bay Roberts, Clarenville, Marystown, Deer Lake, Channel-Port aux Basques
Nunavut
qaluit, Rankin Inlet, Arviat, Baker Lake, Igloolik, Cambridge Bay, Pond Inlet, Kugluktuk, Pangnirtung, Cape Dorset, Gjoa Haven, Taloyoak, Clyde River, Naujaat, Coral Harbour, Kimmirut, Sanikiluaq, Whale Cove, Chesterfield Inlet, Grise Fiord
Prince Edward Island
Charlottetown, Summerside, Stratford, Cornwall, Montague, Kensington, Souris, Alberton, Georgetown, Tignish
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From coast to coast, AMSOIL Dealers are earning high marks from customers who know their engines. Whether it’s a daily driver in New York, a dirt bike in Arizona, or a diesel truck in Texas, real reviews are rolling in from every corner of the country — all praising the performance, protection, and reliability that AMSOIL delivers.
