How Often Should Car Engine Oil Be Changed Based on Time?

[StJeffrey]

Car engine oil should generally be changed approximately every 6 months. Engine oil, also known as engine lubricant, serves the following functions: 1. Reducing friction and high temperatures; 2. Cooling and lowering temperature; 3. Cleaning and removing contaminants; 4. Dampening vibrations and cushioning impacts; 5. Preventing rust and corrosion. The steps for changing car engine oil are as follows: 1. Start the vehicle's engine to warm it up; 2. Unscrew the oil drain bolt; 3. Remove the oil filter; 4. Apply new oil to the gasket of the new oil filter; 5. Pour the new oil into the oil pan; 6. Check for leaks under the engine and verify the oil level using the dipstick before starting the engine for testing. Engine oil consists of base oil and additives. The base oil is the primary component of lubricating oil, determining its fundamental properties, while additives compensate for and enhance any shortcomings in the base oil's performance.

[DeHeidi]

I usually change the engine oil every six months because I mostly drive in the city, commuting about 20 kilometers round trip. However, time is a crucial factor—just like food expiring, engine oil naturally degrades and loses effectiveness. When the car is not in use, the oil in the engine absorbs moisture from the air, thickens, or becomes contaminated, reducing its protective capabilities for the engine. My car manual recommends changing the oil every six months, and I strictly follow that. Additionally, high summer temperatures may accelerate oil oxidation, while winter conditions are comparatively better. On average, changing the oil twice a year is ideal to prevent engine carbon buildup or wear, ensuring low maintenance costs and safety. Don’t forget to check the dipstick for clear oil color—it’s a simple self-inspection method I always use to keep my car in good condition.

[DelCaleb]

As a veteran driver with 30 years of experience, I insist on changing the oil every 12 months, which is the safest interval. When driving less, such as during breaks from long trips, oil life isn't just about mileage—over time, it degrades and loses its lubricating effectiveness. Modern oils have improved in quality, with synthetic oils being more durable, but it's better to be conservative. I check the oil condition monthly, and if it turns black or becomes too viscous, I change it early. In cold regions like the north, the interval can be shortened to 9 months due to low temperatures accelerating oil deterioration. Don't rely solely on sensor alerts; regular manual maintenance is more reliable. Developing this habit can significantly extend your vehicle's lifespan.

[StAmy]

The traffic in my city is terrible, and I commute daily in a small car, but I make sure to change the oil every 8 months based on time considerations. Sticking to a fixed schedule is worry-free, as oil left sitting for too long can absorb moisture and dust, leading to oxidation. I don’t drive much—only on weekends—so changing it every six months feels like a waste of money. I extend the interval a bit but stay within the safe limit of one year. Always check the manual’s recommendations—my Japanese-brand car suggests every 12 months, so I compromise. Remember, different oil types vary significantly: synthetic oil lasts longer, while mineral oil needs more frequent changes.