How Long Can a Car Go with an Overdue Oil Change?

The duration a car can go with an overdue oil change can vary significantly based on several factors, including the type of oil used, the vehicle's make and model, driving conditions, and how the vehicle is driven.

Type of Oil

Conventional Oil

Conventional oil should be changed every 3,000 to 5,000 miles. Going beyond this interval risks engine damage due to the oil's degraded condition.

Synthetic Oil

Synthetic oils can often last between 7,500 to 15,000 miles. However, even with synthetic oil, it is advisable to change it based on the manufacturer's recommendations to ensure optimal performance and engine health.

Driving Conditions

Driving under severe conditions, such as frequent short trips, stop-and-go traffic, and extreme temperatures, can cause oil to degrade faster than normal. These conditions can shorten the oil's lifespan and increase the likelihood of engine issues.

Vehicle Make and Model

Some newer vehicles come with built-in oil life monitoring systems that alert you when it's time for an oil change based on the actual driving conditions. These systems can help ensure that oil changes occur at the optimal times, but it's still essential to follow the manufacturer's recommendations.

General Recommendations

While it is possible for a car to run for a while with an overdue oil change, it is not advisable to rely on this. Extended periods without an oil change can lead to sludge buildup, decreased engine performance, and ultimately, engine damage. Therefore, adhering to the manufacturer's suggested oil change intervals is crucial for maintaining engine health and performance.

Real-Life Example

A colleague of mine drove a car for over 100,000 miles without an oil change, and it still seemed to perform well. However, at such high mileage, the car was not worth maintaining, and he eventually traded it in. While this approach might work for some, it is not a recommended practice.

From personal experience, I have found that taking an oil change every 5,000 to 10,000 miles and using high-quality oil like Castrol GTX, especially on highways, can prevent issues and ensure the engine remains in top condition. Just like the line in the sand regulation in sports, there is no exact number, but it's generally wise to get the oil changed at your next convenient time.