How many years can a new car engine last at least? How long can it last if it is well maintained?

The life of a new car engine depends on many factors, including engine type, manufacturing quality, driving conditions, usage habits, and maintenance. Generally speaking, the service life of an ordinary gasoline or diesel engine can reach about 10 to 15 years or 200,000 to 300,000 kilometers under normal driving and reasonable maintenance. Some high-performance or high-quality engines, such as those of German and Japanese cars, may even reach 400,000 kilometers or more.

Main factors affecting engine life:
Manufacturing quality: High-quality engine design and materials have longer service life and more stable performance.
Driving habits: Frequent sudden acceleration, sudden braking, and bad driving habits may accelerate engine wear.
Driving conditions: Driving in harsh road conditions or climatic conditions (such as high temperature, extreme cold, and dusty places) may cause more wear on the engine.
Maintenance: Regularly changing the engine oil, oil filter, and air filter, maintaining the correct cooling system status, and regular inspection and maintenance are the keys to extending the life of the engine.
If properly maintained, how long can the engine last?
If you follow a strict maintenance and care plan, the life of the engine can be greatly extended to more than 20 years or 500,000 kilometers or even more. Key maintenance includes:

Regular oil changes: Oil is essential for lubrication and cooling of the engine. Timely replacement of high-quality oil can prevent excessive wear of engine parts.
Cooling system maintenance: Ensure that the radiator and coolant are working properly to prevent engine overheating.
Regular replacement of air filters and fuel filters to ensure clean air and fuel.
Timely inspection and replacement of key parts such as spark plugs, belts, sensors, etc. can help avoid major engine failures.
Summary:
Under normal circumstances, the service life of the engine is about 10-15 years or 200,000 to 300,000 kilometers. If properly maintained, the life of the engine can be extended to more than 20 years or 500,000 kilometers, or even longer.