Extended Oil Life System

IPU’s OilLife system formally known as (EOLS: Extended OilLife System) is a kidney loop filtration system that offers an effective alternative to traditional oil filters. When installed in parallel with an existing filtration system, the OilLife unit uses the dual action of filtration, to remove particles from oil (down to 1 micron). The evaporation process removes damaging gases and liquids from oil; this improves overall oil condition and prevents further oil contamination.

About 80% of engine failures can be attributed to contaminated oil, in hydraulic systems the figure is even higher with around 90% of breakdowns being caused by oil borne contaminants. Traditional full-flow filters usually struggle to remove small wear particles and are unable to remove gaseous contamination.

IPU’s OilLife system is suitable for engine, hydraulic, transmission and compressor oils and the results and benefits are impressive:

  • Oil drain intervals extended by at least 4 times
  • Reduced wear and damage to the engine
  • Reduced oil usage and disposal cost
  • Minimised filter replacement and ongoing consumable costs
  • Reduced likelihood of unpredictable maintenance

IPU’s state of the art dual filtration and slow venting method combines to remove all oil based contaminants. A large percentage of engine failures are attributed to oil contamination and their are a number of root causes which lead to contamination such as liquids and sludge, soot, abrasive particles and fuel dilution. IPU’s OilLife system removes at least 98.4% of solid contaminants down to 1 micron in a single pass through the use of its innovative dual filtration process.

Extended oil life is one part of IPU’s services to help industries that rely on heavy capital equipment – especially if that equipment operates in remote locations. Key beneficiaries are shipping:


STOR power generation:

How the OilLife dual-action system works

IPU’s OilLife system combines the dual-action process of filtration and evaporation to remove all oil based contaminants.Contaminated oil  is transferred through a small metering jet under normal engine oil pressure supplied by the engine’s oil pump.

Oil is then passed through the long-strand, protein rich cotton, a highly efficient filtration medium capable of absolutefiltration down to 1 micron. At this stage acidic contaminants react with the protein rich cotton thereby removing them completely from the oil. Once filtered, the oil then enters the heated evaporation chamber where liquid contaminants and gasses are evaporated and immediately vented.

The OilLife unit features a unique patented diffuser plate design, which provides a large heated surface area relative to the volume of oil. This allows the thin film evaporation effect to remove all precursors to acid formation. After these contaminants are removed, the clean oil is gravity-fed back to the engine oil sump. For hydraulic applications such as bow thrusters the system incorporates its own electrically powered pump to provide oil circulation through the cleaning system and back to the hydraulic tank.

Why is 1 micron filtration important?

Particulate size of less than one micron will not have an abrasive effect in engine or hydraulic oil. Most quality engine and hydraulic oils will keep solid contaminants under 4 microns (such as sludge) in suspension. When particles combine they will fall out of suspension and collect in the engine oil sump; this results in a considerable drop in performance in the engine and hydraulic system.

Cost comparison

Example cost analysis

Engine Oil and Filter Maintenance Costs Before Oil Life Extender fitted (with standard service interval of 400 hours) Engine Oil and Filter Costs After Oil Life Extender
fitted (with extended service interval of 1,600 hours)
Operational Savings per year
£2,350.00 £658.00 £1,692.00
* Figures are for guidance only.


  1. 1,000kVa generator
  2. Running 3,000 hours a year
  3. 180 litres of oil
  4. industry average labour, oil and filter prices

 Evaporation process

  • Unique thin film evaporation chamber design
  • Heating element
  • Thin film evaporation effect removes water, diesel fuel (light hydrocarbons) and sulphur dioxide / trioxide

Filtration process

  • Long-strand, unbleached, unprocessed cotton
  • Solid contaminants filtered down to 1 micron
  • Slow flow rate (40 litres per hour) in order to retain solid contaminants and allow chemical reaction with cotton (acid retention)
  • Prevents build up of sludge

Product comparison – Why choose IPU’s OilLife system?

IPU’s OilLife system removes at least 98.4% of solid contaminants down to 1 micron in a single pass. The OilLife system prevents the formation of the acids which hamper an oil’s ability to lubricate, seal and cool the engine. The system’s dual action of filtration and thin film evaporation is five times more effective than alternative diffuser plate designs.

The OilLife system is a versatile and effective solution enabling use across a wide range of applications including transmission fluids, hydraulic oils, compressor and engine oils.

OilLife benefits:

  • Greater cost savings – lower unit cost, lower consumption in filter media and 2 stage disposal process
  • Suitable for a wide range of high and medium speed engines
  • For use with multiple applications

Alternative systems

Centrifuge models are partially effective at removing sub 5 micron contaminants

  • Most alternative by-pass systems are application specific
  • Higher unit cost and up to six stage disposal process
  • Alternative models cover a lower application range

Technical specification

  OP15 OP25 OP50 OP80 OP100 MOCS
Maximum engine hp (guide) 150 250 500 800 1000 N/A
Max oil capacity litres (engines) 15 25 50 80 200 N/A
Max oil capacity gallons UK (engines) 3 6 11 18 44
Max oil capacity gallons US (engines) 4 7 13 21 53
Maximum oil capacity litres (hydraulics) 200 500 1000 2000 3000 2000
Maximum oil capacity gallons UK (hydraulics) 11 33 110 441 661 440
Maximum oil capacity gallons US (hydraulics) 15 40 100 500 1000 528
Flow rate litres/hour 40 40 40 40 40 40
Flow rate gallons UK/hour 9 9 9 9 9 9
Flow rate gallons US/hour 11 11 11 11 11 11
Current draw amps
12 VDC 12.5 12.5 12.5 12.5 12.5 N/A
24 VDC 6.25 6.25 6.25 6.25 6.25 N/A
110 VDC 1.36 1.36 1.36 1.36 1.36 N/A
220 VDC 0.68 0.68 0.68 0.68 0.68 N/A