It is not without reason that we call engine oil the lifeblood of the engine. And it is not necessarily for just the reason that oil runs through the engine. It is called so because the engine oil performs several critical functions that assist in maintaining optimum engine performance and maximizing engine life as well as cooling the engine. And it is necessary to follow oil service intervals as recommended by the respective manufacturers of your brand. To ignore or extend the oil service intervals will lead to several risks and we list some major ones.
1. Increased sludge and oil soot levels.
One of the main duties of engine oil is to keep the engine parts running smoothly by collecting and suspending the dirt particles. By extending the oil change interval, you also increase the amount of soot (mass of impure carbon particles resulting from the incomplete combustion of hydrocarbons) in the oil that will inadvertently cause sludge, thus decreasing the engine’s ability to work efficiently.
2. Reduced crankshaft bearing life.
The reduction of bearings’ life will be reduced through many factors including fuel dilution, coolant leaks, abrasive wear and corrosion. With extended oil change intervals, the levels of abrasives, fuel and coolant increase in the oil thus leading to removal of the bearing overlay and cause damage to the bearing linings.
3. Damage to engine.
Missing the oil change interval will lead to engine damages, resulting in minimizing engine durability and safety. Extended oil change interval will also lead oil contamination eventually leading to loss of engine power.
4. Cam shaft failure.
To lower emissions, manufacturers have been continuously improving cam metals, hardness, surface finishes etc to increase fuel injection pressures. If the soot in the engine oil goes overboard, the abrasive wear between rocker shaft and rocker bearing will increase leading to rocker arm failure.
5. Increased metal particles in oil.
When you extend your oil drain interval, the metal particles suspended in the oil also increase along with the kilometres your engine does.
Here are some photos below of a clean, regularly serviced engine and one that has been damaged due to sludge.
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