Conventional motor oil, refined from crude oil, contains impurities and has a shorter thermal breakdown time. Driving in extreme climates—either very hot or very cold—also stresses the oil.
How to Check Your Oil Level and Condition Step by Step
It tends to accumulate sludge and varnish more quickly, necessitating changes around 3,000 to 5,000 miles. This leads to condensation mixing with the oil, diluting its lubricating properties and creating a breeding ground for contaminants.
Short trips, particularly those under 10 miles, prevent the engine from reaching optimal operating temperature. These recommendations are not arbitrary; they are the result of rigorous laboratory and real-world testing.
How to Check Your Oil Level and Condition Correctly
More directly, checking the dipstick reveals the oil’s condition; if it appears dark, gritty, or has a burnt smell, it is no longer capable of protecting the engine and should be changed immediately, regardless of the odometer reading. Warning signs that your oil may be failing include unusual engine noise or "ticking" sounds on startup, which can indicate low oil pressure or inadequate lubrication.
More About How often does a car need an oil change
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