What should be done to single element foam filters to help them catch dust particles better?

Oiling single element foam filters enhances their ability to trap dust particles effectively. When these filters are properly oiled, the oil forms a sticky layer on the foam, which captures and holds onto dust, dirt, and other debris as the air passes through the filter. This not only improves the filter's efficiency in cleaning the air entering the engine but also helps protect the engine from wear and damage caused by unfiltered particles.

While drying thoroughly, replacing, or soaking the filters may have their purposes in maintenance, they do not directly improve the filter's capacity to catch airborne particles. Drying may lead to a less effective filter, replacement can be costly, and soaking could potentially damage the foam or wash away any oil that aids in filtration. Thus, applying oil to the foam filter is the recommended practice to enhance its performance.

Maintaining oil on foam filters is crucial for optimal engine performance and longevity. Properly oiled filters can significantly reduce engine wear, improve gas mileage, and ensure more efficient operation.