Since 2019, full synthetic oil and semi-synthetic oil changes have been the norm for most automobiles. This is more than half of all drivers. However, choosing standard engine oil is still an option when having your oil changed, and almost a fourth of all cars brought in for service do.

Is it the best oil for your vehicle?

It may be challenging to fully comprehend why one form of engine oil is superior, regardless of whether you’re a novice driver or an experienced automobile owner.

You must know some unassailable facts about conventional vs. full synthetic oil, and this article will explain them to you. You’ll discover the distinctions between full synthetic oil and conventional oils and the advantages each has in terms of oil changes for cars.

Conventional oil: What is it?

Let’s start with conventional oil, a time-honored staple often used in older vehicles.

Refined crude is the source of conventional oil. The most significant benefit is the price; conventional oil is less expensive than synthetic oil by up to 10%. While some claim that this is due to the “drawbacks” of this oil, which may reduce lifetime, maintenance requirements, and operation, that is not the whole story.

The truth is that not every car is made to use other synthetic lubricants. Because that’s what we had, older automobiles, for instance, were constructed with conventional oil service.

Furthermore, a car’s mileage is essential. Even though engines are already sophisticated enough, any technician will tell you that an engine’s age influences how smoothly a car’s gears mesh. These industry experts claim that a car’s inner gears and moving components become more prone to wear and tear after 75,000 miles, and the flow rate of lubricants may significantly impact this.

Conventional oil better protects older engines since they flow more slowly than fully synthetic oils. Because conventional oil offers superior lubrication for aged engines, specific vehicle types might start to prefer it over synthetic alternatives.

However, conventional oils are far more prone to abrasion and chemical deterioration under demanding circumstances, such as colder temperatures. The proper circulation is hampered by these heavier fluids, which may also block tiny spaces on equipment. This is particularly true if the oil lacks an additional package created specifically for it.

Full Synthetic Oil: what is it?

Your car’s oil comes from a natural resource. However, full synthetic oils are not substances that are found in nature.

These oils generate a petroleum substance that functions similarly to regular oil by combining crude oil with synthetic ingredients. Synthetics are the best engine lubricants for new cars or those with little mileage.

Synthetic blend (sometimes referred to as semi-synthetic) and full synthetic oil are the two varieties of synthetic oil.

Synthetic blend oil is created by combining traditional and synthetic oils. While it functions similarly to traditional lubricants, the inclusion of synthetics provides your car’s engine with superior protection.

On the other hand, fully synthetic motor oil starts with synthetic oil and then adds additives to maintain the engine’s performance. Polyalphaolefin, castor waxes, and paraffinic oils are a few examples of additions.

Depending on the manufacturer’s desire for performance or protection levels, these fluids may be combined in various ratios. However, the majority of businesses choose to blend these ingredients equally. These good balance performance and protection, so it often doesn’t matter which mix you get as long as it is synthetic.

When should you use full synthetic oil instead of conventional oil?

In addition to other consequences of engine wear, the additives in synthetic motor oil provide superior engine protection against corrosion and rusting from contaminated water. Because of this, synthetics are perfect for high-performance engines and those who drive many miles throughout a vehicle’s lifetime.

Sludge from conventional oils will build up in the engine over time, causing it to perform worse and last for a shorter period. Switching to complete synthetics, as opposed to merely routine oil changes, stops your engine from accumulating deposits and removes any sludge that has already built up.

You probably already know that the oil settles if you haven’t driven your car for a while or live somewhere cold. It would be best if you thus waited a bit after starting the engine before your conventional or synthetic mix oil gets to the crucial engine components.

However, waiting is not necessary when using full synthetic oil. Instead, the oil moves rapidly and smoothly throughout your engine, giving the impression that your car has just been driven.

Synthetics are also preferable for modern cars since they don’t degrade or evaporate in hot climates, under prolonged sun exposure, or when the engine works too hard, such as while towing.

The interval between oil changes is also greater with synthetics than with regular oils. They provide engine protection on both short and long excursions. Therefore, your maintenance plan might stretch to 15,000 miles before your next service instead of the customary 3,000 to 5,000 miles.

However, the frequency of a high mileage oil change varies based on driving habits, environmental factors, and the type of full synthetic motor oil. Therefore, before spending money on an oil change, check the owner’s handbook of your car.

When is Full Synthetic Oil Better Than Conventional Oil?

Fully synthetic motor oil has several advantages over regular motor oil, as was already discussed. However, the “proper oil” for your vehicle type relies on your engine’s characteristics, how old your car is, and how many miles you’ve previously driven.

Also Read: Best Time to Learn Driving

Frequently Asked Questions

How often should synthetic oil be changed?

Every 10,000 miles, you should replace the synthetic engine oil in your automobile.

How many miles does a change of synthetic oil last?

The typical lifespan of a synthetic oil change is between 5,000 and 10,000 kilometers.

How much should it cost to replace a synthetic oil?

Changing to synthetic engine oil generally costs between $30 and $50.

Is synthetic motor oil preferable?

What you do with your automobile will determine this. Full synthetic oil, for instance, may be more suited for drivers who often travel long distances and want their engines to work optimally.

On the other hand, stop-and-go traffic is more common for city drivers. Full synthetic oil may not be necessary for this situation; a synthetic mix could be enough.

What happens if you go 10,000 miles without changing your oil?

If you don’t replace your oil every 3,000 miles, experts say the engine might develop carbon buildup. Oil sludging is another name for this occurrence.

Also Read: How to Choose a Perfect Driving School


Nowadays, fully synthetic oil is the new industry standard, and conventional oil is still a viable alternative depending on the age of your automobile. In general, synthetic oils do extend the life of your engine and guarantee that you won’t need to see your technician often for oil changes.

Therefore, read your owner’s handbook before making any crucial selections concerning oil change services. For older engines that have good gas economy, the organic ingredient in synthetic oils, for instance, might cause seals to crack and engine leaks.

Because of the variables involved in an oil change, it is crucial to get expert assistance from your technician before moving further.