Changing your car oil every 3000 miles to 5000 miles provides for increased mileage, lower oil consumption and improved trade-in value.
It is generally accepted that miles traveled on highways are less stressful on an engine than miles traveled in cities, and the research tends to confirm this.
There are fewer starts and stops along a highway. The engine can run at its highest efficiency for extended periods of time and maintain a constant temperature.
Driving in cities is the exact opposite. As a result, an engine with 80,000 miles may have the same amount of wear as one with 150,000 miles. Everything relies on how the car has been maintained and driven.
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