The Carbon Footprint of a CJC Filter: How Oil Filtration Achieves a Net Negative CO₂ Impact
Steffen D. Nyman
9 min
18 June 2026
Most industrial equipment adds to your carbon footprint. A CJC filter can subtract from it. Here is the data behind a documented net negative CO₂e impact of -6,012 kg over a filter's lifetime
When a Maintenance Product Has a Negative Carbon Footprint
Industrial equipment is almost universally a source of CO₂ emissions. Motors consume electricity, machines wear out and require replacement parts, oils need to be changed and disposed of. The message is clear: operating machines produce emissions. Oil filtration challenges that assumption. When the full lifecycle of a CJC filter is calculated - manufacturing, transport, operation, and the savings it generates in the systems where it runs - the result is a documented net negative carbon footprint of -6,012kg CO₂e over the filter's operational lifetime.
The filter removes more carbon from the equation than it adds. This article explains how that number is reached, what drives it, and what it means for industrial operators who are under pressure to reduce their Scope 3 emissions.
Understanding Scope 3 And Why It Matters For Equipment Operators
Carbon emissions are typically categorised into three scopes. Scope 1 covers direct emissions from owned sources. Scope 2 covers indirect emissions including purchased energy. Scope 3 covers everything else in the value chain - including the emissions generated by products a company sells and the products its customers use.
For C.C.JENSEN, 81% of the total carbon footprint falls in Scope 3 - specifically in the operation of CJC filters at customer sites. This implication and the most significant lever for reducing the company's overall carbon impact is designing products that generate measurable savings when operated at customers’ site.
For the industrial operator, the same logic applies in reverse. The equipment and consumables you purchase contribute to your Scope 3 emissions. A filter that reduces your oil consumption, energy use, and component replacement rate reduces your Scope 3 footprint.
The Chain Reaction From Contamination To Emissions
When oil becomes contaminated with particles, water, and degradation products, friction increases throughout the system. Higher friction means higher energy consumption. As wear accelerates, components fail sooner, requiring replacement. Each replacement part carries a carbon cost. The contaminated oil must eventually be drained, transported, and disposed of - a process with its own emissions footprint.
Offline filtration interrupts this chain at its source. By continuously removing contamination, it keeps friction low, extends component life, and dramatically extends oil life, thus limiting waste oil. Each of these outcomes has a measurable carbon equivalent
Documented CO₂ savings by sector
The savings are not theoretical. C.C.JENSEN has documented CO₂ reductions across customer installations in multiple sectors over ten-year periods. Here a few examples:
Sector | Application | CO₂ saving over 10 years |
|---|---|---|
Industry | Injection molding machines with oil life extended by factor of 3 | 30 tonnes CO₂ per machine |
Marine | Replacing centrifugal separator with CJC filter on diesel engine lube oil | 1,680 tonnes CO₂ per ship |
Mining | Eliminating 75% of oil changes in an average mine site | 2,846 tonnes CO₂ |
Power | Gas turbine oil life extended by factor of 3 | 216 tonnes CO₂ |
Wind | Avoiding at least one oil change per turbine gearbox in 10 years | 2 tonnes CO₂ per wind turbine |
How the -6,012 kg CO₂e figure is calculated
The below example is a 20-year Life Cycle Assessment calculated for the HDU 27/54 on a gear box containing 1,000 L oil and installed in Germany. Assumption of normal oil changes of 3 years are prolonged to only every 8 years.
The CO₂ equivalent:
+ 322 kg for maufacturing the filter, including materials and production
+ 58 kg for transport to site
+ 34 kg for installation
+ 9,493 kg for electricity and maintenance of the filter incl. new inserts every year for 20 years
- 15,824 kg savings generated by extended oil life and avoiding waste oil
+ 110 kg for dismantling and transport at the end of life for the filter unit
- 205kg subtraction for reuse of metals in the filter unit
Total - 6,012 kg CO₂e net negative figure, equal to more than 6 tonnes, for this single filter installation
The filter does not merely offset its own emissions - it generates a net negative carbon footprint. On top of this comes negative kg of CO₂e from avoided downtime, reduced component wear and replacement, and lower energy consumption due to lower friction and less maintenance of the oil system. As this is difficult to calculate it is omitted from above example but would make the net negative CO₂ equivalent even larger.
What This Means For ESG Reporting and Procurement
For industrial operators required to report on their carbon footprint, oil filtration is a controllable variable with a documentable impact. Unlike many sustainability initiatives, the carbon savings from filtration are a direct consequence of operational improvements that also reduce costs.
Extended oil life reduces OPEX directly. Fewer component replacements reduce maintenance costs. Lower energy consumption reduces the electricity bill. The carbon reduction is a co-benefit of decisions that are financially justified on their own terms.
Conclusion
The carbon footprint of a CJC filter is negative based on this case and it's underlying conditions. That is not a marketing claim - it is the result of a lifecycle calculation that accounts for manufacturing, transport, and operation on one side, and documented savings in oil consumption on the other.
For operators under pressure to reduce Scope 3 emissions, oil filtration is one of the few maintenance investments that simultaneously reduces costs and can reduce your carbon footprint.
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