How long does an engine typically last?


Editorial team Published on

A well-maintained modern car engine lasts 150,000 to 250,000 miles on average, with many lasting 300,000 miles or more under ideal care.

Average Lifespan by Engine Type

  • Gasoline Engines: Typically last 150,000 to 250,000 miles (about 10 to 15 years of normal driving).
  • Diesel Engines: Built with heavier internal parts and thicker walls to handle high pressure, diesel engines often last 500,000 to 1,000,000+ miles.

Key Factors Affecting Engine Life

  • Maintenance: Routine oil changes are the single most important factor. Dirty oil or low fluid levels cause friction and early wear.
  • Driving Habits: Frequent short trips, aggressive acceleration, heavy towing, and letting the engine work hard before it warms up reduce lifespan.
  • Manufacturer & Build: Brands known for high durability (like Toyota and Honda) often outlast others. Iron engine blocks also resist wear better than aluminum ones.

Opinions on Reddit are mixed; while modern engineering makes 300,000 miles possible, many drivers note that other expensive vehicle components often fail around 200,000 miles, making major repairs uneconomical.