How often should engine oil and transmission fluid be changed?

[LeSamantha]

Engine oil should be changed approximately every 6 months, while transmission fluid should be changed every 3 years. The method for changing engine oil is as follows: 1. Start the vehicle engine to warm it up; 2. Unscrew the oil drain bolt; 3. Remove the oil filter; 4. Apply new oil to the interface gasket of the new filter; 5. Pour the new oil into the oil pan; 6. Check for leaks under the engine and inspect the oil dipstick before starting the engine for testing. The method for changing transmission fluid is as follows: 1. Remove the drain plug at the bottom of the transmission to drain the old fluid; 2. Remove the inner and outer transmission housing; 3. Remove the transmission fluid filter; 4. Take off the oil pan gasket and clean surrounding stains; 5. Wipe the cleaned transmission fluid filter with cotton cloth; 6. Add new fluid and complete the installation.

[VonJulian]

I've been driving for almost twenty years, and changing engine oil and transmission oil depends on usage habits. Engine oil is generally replaced every 5,000 to 10,000 kilometers. If you frequently encounter traffic jams or accelerate aggressively, the oil temperature rises and the oil quality deteriorates faster, so it's better to change it at 5,000 kilometers—don’t skimp on this, or engine wear could lead to major issues. Transmission oil has a longer replacement interval: manual transmissions should be changed every 50,000 to 80,000 kilometers, while automatic transmissions require replacement around 60,000 to 100,000 kilometers. I usually check the dipstick every 75,000 kilometers—if the oil turns black or has a burnt smell, it’s time for a change. High-mileage driving also affects oil lifespan, so pay extra attention to the cooling system on highways to avoid overheating and damaging components. Regular maintenance can save you from costly repairs, and I recommend using synthetic oil for better durability.

[OArya]

When I first started learning to drive, I was completely confused about oil change intervals. It wasn't until I consulted experienced drivers that I understood. Engine oil is best changed every 7,500 kilometers or every 6 months, whichever comes first. Transmission fluid needs changing much less frequently - manual transmissions typically require changes every 60,000 to 100,000 kilometers, while automatics need it around 80,000 kilometers. Now I check oil levels and color monthly - if the oil becomes thin or darkens, I change it immediately. Different vehicle brands have different requirements, so checking the owner's manual is most accurate. Remember, new cars need more frequent oil changes during the first few thousand kilometers to help break in components. In daily driving, frequent highway speeds or steep hill climbs accelerate oil degradation, so adjusting intervals based on driving conditions can prevent unexpected failures.

[VonHarmony]

As a regular car owner, the engine oil change interval is typically every 8,000 kilometers or 12 months. Keeping fresh oil ensures proper engine lubrication. Transmission fluid requires less frequent changes - manual transmissions need replacement every 50,000 to 80,000 kilometers, while automatic transmissions can extend to around 80,000 kilometers. The key is to consult your vehicle's maintenance manual rather than blindly following generic advice. For instance, in high-temperature areas or dusty conditions where oil degrades faster, the interval should be shortened. I check oil levels quarterly to minimize leakage risks. Simple maintenance can prevent major issues.