What’s the Role of Engine Oil & When Should You Change It?

We’ve all been there before… a casual afternoon drive turned awry thanks to a flashing CHECK ENGINE light on our car’s dashboard. You’ve been through this before and know that this could be flagging any number of issues.

But sometimes, what that flashing light may really be warning you about is your engine oil!

More often than not, you likely won’t be driving on not enough oil — you wouldn’t be getting very far, otherwise! Instead, you may be suffering from insufficient oil intake or even poorly performing oil.

Diagnosis: You need an oil change.

This is why every good car owner should make sure they know precisely which type of oil their car is supposed to use, and ensure it is topped up and replaced as often as needed. Every vehicle make and model recommends different types of oil at different viscosities (thickness) for optimal performance, whether that is fully synthetic, semi-synthetic, or pure mineral.

Knowing what type of oil your car takes and how often it needs to be changed will help ensure your car runs faster for longer while also protecting its major components from wear and tear and keeping you safe on the road. So let’s get our hands dirty: here is everything you need to know about the role of engine oil in a car and when to change it.

What Does Engine Oil Actually Do?

We all know that engine oil is necessary for cars to operate smoothly and efficiently, but there is more to this magic liquid than meets the eye. Without a steady stream of oil running through your vehicle, many core functions will struggle, leading to increased wear and tear over time and even direct damage.

Here are some of the many things that engine oil does inside your vehicle.

Lubrication

One of the main functions of engine oil is lubrication, helping keep your car operating smoothly and with little resistance. Oil will help prevent metal-on-metal contact, ensuring components won’t wear down as quickly or be damaged by grinding.

Cooling

Oil is also important for keeping your engine cool. By absorbing extreme heat from moving parts like pistons and bearings, and then circulating it to a cooler or the engine’s oil pan, away from the main motors, engine oil helps relieve strain on the radiator and prevent your car from overheating, warping, or seizing.

Cleaning

Oil also helps keep your car’s internal mechanisms clean by picking up combustion by-products from the ignition process. Most engine oils are formulated with specialised chemical detergents and dispersants; these additives lift away microscopic dirt, carbon, and metal shavings and help prevent the inner workings of your car from clogging and failing.

Protection

Engine oil also assists with overall protection. By preventing corrosion and wear and tear, oil protects your car and can extend its life by years, keeping you on the road for even longer and protecting resale value!

How Often Should You Change Your Engine Oil in Australia?

The general rule of thumb is you ought to change your engine oil every every 10,000KM to 15,000KM, or every 6 to 12 months, whichever comes first. Of course, depending on your vehicle’s make and model, where you are, and how you are driving, this time period can vary.

If you’re doing lots of stop-start driving or towing a big load, you may need to change it sooner rather than later. And if you are driving in particularly hot conditions or places, your oil may be working a little harder than usual to keep your car cool.

Similarly, you may need to change your oil more frequently if using mineral oil. Synthetic oil tends to be more consistent and refined, and it lasts longer than conventional mineral car oil.

If you are ever unsure whether you are due for an engine oil change, consult your car’s manual and talk to an expert in one of the suburbs we service. They will steer you in the right direction!

What Are the Signs Your Car Needs an Oil Change?

If your engine’s oil is due for a change, then it can affect many parts of your car at once. Here are some signs your car needs an oil change to keep an eye out for.

• Dashboard warnings or flashing lights.
• Loud engine noises or signs of struggling.
• You are filling up your tank more often.
• Dirty, dark oil was found under the car.
• Frequent exposure to exhaust smoke.
• You smell something unusual, like burning.

If you notice one or more of these issues, then your engine oil is probably not working as well as it should! For the sake of your car’s inner mechanisms and your fuel economy, book yourself in with a local mechanic for a repair service.

Synthetic vs Semi-Synthetic vs Mineral — Which Oil Does Your Car Need?

Your car needs to use the oil specified in its owner’s manual.

Generally, full synthetic oil is best for modern, high-performance engines. Semi-synthetic oil is a cost-effective middle ground for everyday driving, while mineral oil is often reserved for older, vintage cars or short-trip vehicles.

Here is a brief breakdown of which oil is best used for what type of car.

Does the oil filter need changing too?

Yes! We recommend replacing the oil filter every time you change your engine’s oil.

Fresh oil poured into an old filter will be immediately contaminated… literally, money poured down the drain. Oil filters are relatively cheap and easy to replace, so if your oil is getting changed, be sure to ask that the oil filter be replaced at the same time!

FAQs

There are no bad questions! Here are some frequently asked questions we receive about getting your oil changed.

How often should I change my engine oil in Australia?

You should aim to change your engine oil every every 10,000KM to 15,000KM, or every 6 to 12 months, whichever comes first, depending on make and model and driving habits.

What does engine oil actually do?

Engine oil is responsible for lubricating mechanical parts, keeping the inner mechanism clean, and preventing your car from overheating.

What happens if I skip an oil change?

If you skip an oil change, you are basically gambling: your car may struggle to run smoothly and wear down its parts faster, potentially damaging your interior and jeopardising your roadworthy certificate.

Keep Your Engine Running at Its Best with S.S.C. Mechanics

Regular oil changes are among the simplest ways to protect your engine, improve fuel efficiency, and extend your vehicle’s lifespan. Whether you need a routine service, a full inspection, or advice on the right oil for your car, the team at S.S.C. Mechanics is here to help.

Book in with us for your logbook service in Melbourne for a professional engine oil change and vehicle check-up. We proudly serve drivers across Airport West and the surrounding suburbs, including those seeking a trusted mechanic in Tullamarine or an experienced mechanic in Essendon.

And do you need flexibility? You can even pay with Afterpay to keep your car maintained without the upfront stress! Make a booking with us today!