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You need an oil change every so often, but do you know why? Despite its status as a routine service, an oil change isn't a top-of-mind service for most drivers on an average day. That's by design. Modern vehicles are convenient in many ways, so you don't need to know too much about their inner workings to keep them running. Every once in a while, however, you might find yourself curious about the why and how of your vehicle and its systems. Today, let's examine the oil change.

What does motor oil do?

Motor oil protects the engine. Specifically, it provides lubrication for the many moving parts of the engine. Without this lubrication, friction would cause wear and damage to these parts. In addition, motor oil carries contaminants to the oil filter (more on that below). This helps keep the engine clean. As it moves, oil also carries heat away from the engine, aiding in temperature control. Finally, many oil brands include additives that provide additional protection for your engine. For example, engine oils with corrosion resistance.

How does oil become dirty?

Oil collects contaminants as it flows, but how do they get there in the first place? The answer varies on the debris. One contaminant comes from the engine and its parts. Over time, tiny bits of metal break away from these parts due to friction (even the best oil can't prevent this completely). The oil filter catches some metal fragments, but others are small enough to slip through with the oil.

As you drive, your vehicle also creates by-products from fuel, such as ash. Oil collects this residue, but it's small enough to escape the filter as well. Dust and outdoor debris may also be present in your oil. This type of debris is able to reach the motor oil because the engine isn't completely sealed off.

Over time, oil will also darken from oxidation and exposure to the engine's heat. As a result, the motor oil becomes less effective and requires replacement. That's why it's important to change your oil.

What happens if I never change my oil?

Sludge. Search images of "engine sludge" and you'll never want to miss an oil change again.

Over time, oil molecules break down and combine with deposits and water to create a sticky, lumpy sludge that clogs the engine. The next time you're thinking about skipping an oil change, think again.

When do you need an oil change?

Oil change intervals vary depending on several factors. At one time, 2,000 miles was the recommended oil change interval for most vehicles. Eventually, that turned into 3,000 miles as formulas improved. Today, recommended intervals range between 3,000 to upwards of 10,000 miles depending on your vehicle, the type of oil you use, and how frequently you drive. Some manufacturers may also suggest changing oil based on time, such as every 6 months or once a year. Review your owner's manual to learn the specifics for your vehicle, or give Lindsay Tire a call and we'll be happy to assist you.

At Lindsay Tire & Auto Care Center, we've performed many oil changes over the years and are happy to assist with yours. Stop by during our hours of operation or give us a call to schedule a time. We serve Lindsay, CA, Strathmore, CA , Porterville, CA, and surrounding areas.