Gear oil filtration improves machinery performance by maintaining the cleanliness of the oil, which is crucial for effective lubrication. Clean oil reduces friction between moving parts, minimizes wear, and prevents the buildup of sludge and deposits. This leads to smoother operation, reduced energy consumption, and less downtime due to maintenance or repairs. By preventing contaminants from causing damage, filtration extends the lifespan of both the gear oil and the machinery components.