Uganda, March 14 -- During minor service for your car, one of the many components you are usually advised to replace, especially after covering 5,000km, is the oil filter. As its name suggests, the purpose of the oil filter is to purify the lubrication used to prevent friction in some, if not all moving parts of your car, for instance engine oil.

Alvin Nkini, a mechanic at Dalas Auto Limited in Ggaba, Kampala, says one of the primary roles of engine oil is to lubricate parts of the engine as they move and rotate around ton metal, without the lubrication element, the metals would grind against each other. But even with the presence of oil, it is hard to eliminate friction 100 percent from the engine.

The small component of friction that ...