Monthly Oil Changes: Worth It or Not?
The frequency of oil changes has long been a topic of debate among car owners. While some recommend changing oil monthly, others suggest less frequent intervals such as twice a year. Let's explore whether monthly oil changes are indeed worth it.
Understanding the Relationship Between Oil Changes and Engine Wear
A reasonable connection exists between oil changes and reduced engine wear. However, it's crucial to strike a balance. For instance, if you pay $50 for oil and $10 for a filter, changing oil monthly would cost you around $700 annually. Over 10 years, you would have spent approximately $7,000 on oil changes, which is roughly equivalent to the cost of changing an engine in many cars. Most engines can last well over 140,000 miles before needing replacement. The instruction manual for my car (BMW), for example, recommends changing oil every 15,000 miles, which is closer to an 18-month interval rather than a monthly one.
Driving Miles and Maintenance Frequency
The decision on how often to change oil depends significantly on your driving habits and the specific make and model of your car. With an Xantia, I found it convenient to change oil and filters approximately monthly due to the high mileage. However, the process is easily manageable because I could park the car, raise the suspension, and perform the task in a mere 15 minutes. Not all cars are as user-friendly as my Xantia, though. Most modern oils last for one year or 10,000 miles; it's unlikely to drive this distance in a single month unless you are a taxi driver. Therefore, unless you drive several thousand miles per month, monthly oil changes are not necessary.
Modern Oil Technology
Modern oils have been engineered to last longer. Most manufacturers recommend that you change oil once a year or every 10,000 miles, whichever comes first. This interval is often longer than a single month and more reasonable for typical driving conditions. Workshops often insist on changing oil every six months, even if the car is unused for the next six months, simply to provide regular maintenance. However, the oil's quality and viscosity should still be checked to ensure it's still suitable for use. Regular checks can allow you to extend the oil change interval without compromising the engine's health.
Ultimately, it's essential to balance cost, convenience, and your car's specific needs. For most drivers, following the manufacturer's recommendations should be sufficient to maintain a healthy engine and avoid unnecessary expenses. If you drive high miles, slightly more frequent checks may be warranted, but the evidence does not support the claim that monthly oil changes are universally beneficial.