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Extending oil life: eight documented cases

These are not promises: each page sets out a study published by the manufacturer, with the equipment, the length of the test and the figures recorded. The original document can be downloaded at the bottom of each page.

The cases

RailEMD GP60 locomotive: 50% less soot in the oilA 25-micron full-flow screen stopped large debris but let soot through. Two Spinner II 3600 centrifuges were added.50 % — less soot, confirmed by oil analysis Surface miningSurface mine: CAT loader drain intervals from 250 to 1,000 hoursEight years of use across a fleet of more than 40 machines in Kentucky and West Virginia, with engine-life figures given by the maintenance coordinator.250 → 1 000 h — service interval on CAT 988 and 992G loaders Mine crushingCopper mine crushers: from weekly oil changes to over two monthsCopper, lead and iron were past acceptable levels. One incident also showed what a centrifuge catches when the unexpected happens.1 sem. → 2 mois — interval between oil and element changes AggregatesNordberg cone crusher: dirt load cut by more than seven timesAirborne dirt crosses the bearing seals and dumps into the lube circuit. A crusher shutdown costs thousands of dollars.5 800 → 800 mg/l — dirt load, from 0 to 540 operating hours Oil and gas drillingDrilling gen sets: oil life extended from 1,700 to 3,000 hoursThis is the study closest to the question “does it pay?”: a controlled test, and a savings figure calculated by the operator.1 700 → 3 000 h — oil service life with the centrifuge, a 75% increase Dredging and marine256-foot clamshell dredge: hydraulics trouble-free 24/7 for over a yearThe only case on a hydraulic system rather than an engine: foreign material was plugging a control orifice.1 an + — of trouble-free operation, 24/7 River towingMississippi River towboat: oil 40% cleaner than the OEM filterThe methodologically cleanest case: two identical engines, only one modified, 1,000 hours, oil samples taken throughout.40 % — cleaner oil, on abrasives larger than 5 microns Waste collectionRefuse trucks: oil changes from 10,000 to 50,000 milesMore than twenty years of hindsight on a complete fleet. This is the case that best answers “does it hold up over time?”.16 000 → 56 000 km — drain interval on 12-litre engines (10,000 → 35,000 miles)

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