Why Do Cars Need Frequent Oil Changes?
2 Answers
Cars require frequent oil changes for the following reasons: 1. To improve and enhance lubrication for the engine's moving friction components; 2. To extend the engine's service life; 3. To optimize the engine's lubrication conditions and reduce friction between moving parts. Precautions for oil changes include: 1. Perform the change when the engine is warm to ensure thorough drainage of old oil; 2. Add new oil and ensure the correct oil level; 3. Start the engine after adding oil and inspect all components for leaks. The oil change procedure consists of: 1. Lift the vehicle, remove the underbody cover, and place a ~10L container beneath the drain plug; 2. Loosen the drain plug, use an air gun to blow through the oil filler opening for two minutes, then tighten the drain plug and wipe with tissue to check for leaks; 3. Reinstall the underbody cover, lower the vehicle, and use a funnel to add new oil through the filler opening.
Having driven for over a decade, I deeply understand why engine oil needs regular changes. Engine oil performs multiple critical roles inside the engine—it lubricates components to reduce friction, cools hot parts to prevent overheating, and cleans the engine interior by flushing away dust and combustion residues. However, with prolonged use, these contaminants accumulate, degrading the oil's quality, making it thinner and losing viscosity. Delaying oil changes increases friction, accelerates engine wear, and may lead to sludge buildup clogging oil passages, potentially resulting in costly overhauls. I once postponed an oil change and ended up with severe engine knocking, costing over $2,000 in repairs. That's why I recommend changing every 5,000 miles, or extending intervals slightly with synthetic oil—this small expense safeguards your vehicle's longevity.
