How many kilometers should Castrol Magnatec 5W40 oil be replaced?
2 Answers
Castrol Magnatec 5W40 oil should be replaced every 10,000 kilometers. The method for replacing the oil is as follows: 1. Lift the vehicle, remove the undercover, and place a container under the oil drain plug; 2. Unscrew the oil drain plug, use an air gun to blow for two minutes at the oil filler port, then tighten the oil drain plug after draining and wipe it with a tissue to check for leaks; 3. Reinstall the undercover and lower the vehicle, then add oil through the filler port. Precautions for oil replacement: 1. Perform the replacement when the engine is warm to ensure the old oil is drained as completely as possible; 2. Add oil and ensure the amount is appropriate; 3. After adding oil, start the engine and check all components for leaks. Run the engine for 3 minutes to confirm the oil level is at the normal mark.
I've been using Magnetec 5W40 engine oil for over ten years and find it quite durable. I usually change it every 8,000 kilometers or so. Driving in the city with heavy traffic means the engine frequently starts and stops, which can degrade oil quality faster. Changing it earlier provides better protection for the car. The manual says it can last up to 15,000 kilometers, but in practice, this isn't suitable for city driving—especially in summer when high temperatures accelerate oil aging, and in winter when cold starts increase wear. I make it a habit to regularly check the dipstick myself and change the oil when it darkens. Don't skimp on this small expense—an engine repair could cost as much as dozens of oil changes. Since I don't drive much on highways, I shorten the interval. I recommend beginners keep a maintenance log and check every six months to avoid potential issues.
