A conventional car can last for 200,000 miles. Some well-maintained car models will reach 300,000 or more miles total. The average passenger car age is currently around 12 years in the United States. Choosing a well-built make and model can help extend your car's longevity.

In 2026, reaching 300,000 miles (482,803 km) is considered an exceptional milestone for a modern vehicle, often referred to as the "holy grail" of car longevity. While the average lifespan of a well-maintained car is typically around 200,000 miles, hitting the 300k mark indicates superior engineering and meticulous maintenance habits. For brands known for reliability, such as Toyota or Honda, this mileage is achievable with regular oil changes, timely timing belt replacements, and proactive rust prevention. However, if you are looking to buy a car with 300,000 miles, it is generally seen as a high-risk investment unless you have a complete service history, as major components like the transmission and engine seals are likely nearing the end of their functional life.