Why is it necessary to change vehicle oil regularly, and not just change the filter and add new oil as needed?
In: Engineering
Oil is an extremely good lubricant however over time the parts will still slowly wear down and these very very fine metal shavings slowly accumulate in the oil and can eventually act as an abrasive. This is why it’s necessary to change both the oil and filter instead of just topping it off. Sometimes so much wear metal can accumulate in the oil that it actually turns silver and at that point the engine is done. Also over time oil becomes less stable and more volatile due to repeated heating. This can come as evaporative loss where you actually lose some oil.
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