Synthetic Motor Oil

The Best Synthetic Motor Oil 2019

Synthetic motor oil is the best possible engine oil that you can provide a gasoline or diesel powered motor vehicle. Oil is the most important auto service product to ensure a healthy running motor that will continue to perform and have a long lifepsan.

The best synthetic motor oil is Mobil 1 94001 5W-30 with its outstanding wear protection due to superior lubrication in high to low temperatures.

The reason car oil is so important is due to the fact it lubricates the engine to reduce wear and friction as well as protecting the break down of components from engine heat. It also cleans all the dirt within the engine and passes heat around the engine.

Best Motor Oil

Synthetic Motor OilFuelViscosity
Mobil 1 94001Gasoline5W-30
Castrol 03101Gasoline0W-40
Shell Rotella T6Diesel5W-40
Royal Purple 51530Gasoline5W-30
Valvoline SynPowerGasoline5W-30

Servicing your vehicle with synthetic motor oil will increase the engine life and ensure the cars remains smooth running. Motor oil for high mileage engines to cold weather are just some of the categories that some motor oils are designed for.

Full synthetic motor oil is slightly more expensive but the range of benefits makes it a worthwhile investment. Cheap oil is often recycled oil that is no good for maintaining a healthy engine.

Using high quality engine oil is recommended and will increase the engines life span, which is what you want if you are intending on keeping it for a few years. Below is a list of the best synthetic motor oils for optimum performance and engine cleanliness.

Mobil 1 94001 5W-30 Synthetic Motor Oil

To kick things off, we have Mobil 1, which is the most popular premium branded synthetic oil. Mobil 1 recommend using their 5w-30 oil in turbo charged and super charged gasoline engine cars as well as multi valved fuel injection engines.

Using the Mobil 1 as your first choice synthetic oil will give various benefits such as smoother engine and certainly better performance all round.

Mobil 1 94001 is highly recommended for modern cars and everyday driving that require a 5W-30 viscosity rating. The advanced formula provides excellent properties that prevent wear and tear of the engine components, thermal and oxidation stability, increase in fuel economy and easier car start ups in the morning.

Overall, it is the best synthetic motor oil for your car that ensures that the engine has superior lubrication on all the moving parts.

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Castrol 03101 EDGE 0W-40

Castrol 03101 Edge claims to have a 42% better rating on fighting power robbing deposits and provides the highest level of protection for critical components. The results of the synthetic formula mean that the engines have excellent engine lubrication to prevent wear and tear that allow your car to drive at maximum power.

Castrol is known for working with high end car manufacturers such as Volkswagen, Jaguar and Land Rover to improve their motor oils worldwide thus making them a market leader. The Castrol Edge is an advanced premium synthetic motor oil that has been tested under intense pressure and is one of the best motor oils you can buy.

Using Castrol 03101 0W-40 motor oil, you can expect engine noise to be reduced to a minimum as well as a smoother engine.

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Shell Rotella T6 5W-40 Synthetic Diesel Motor Oil

Shells Rotella T6 fully synthetic motor oil contains a low ash additive that provides additional protection to vital engine components of a diesel engine that adapts to the driving conditions. In order to adhere to the latest emission standards, the Rotella formula made by Shell include lower levels of ash, phosphorous and sulfur.

You can also use Shell Rotella in some motorcycles, which is great value for money when you compare the price of motorcycle fully synthetic oil to the Rotella T6. Diesel engines in particular will benefit greatly from reduced engine noise and an increase in fuel economy.

If you are driving in very cold temperatures, the Rotella T6 has high viscosity levels to improve the flow and provide protection against degradation. Overall, it is the best synthetic motor oil for diesel cars that require a heavy duty engine oil formula.

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Royal Purple 51530 High Performance

Royal Purple 51530 fully synthetic is the motor oil of choice for those car owners who are looking for high quality performance oil. The 51530 motor oil by Royal Purple has a refined formula to increase power and improve the smoothness of the engine.

The lubrication of the 51530 has been designed with anti wear compounds that prevent vital engine components from friction damage. A combination of premium group 1 base oils mixed with their additives produce one of the best engine oils for high performance.

For older and highly mileage car in particular, the Royal Purple 51530 can assist with the reduction of oil consumption as well as increasing lubrication to increase the lifetime of the engine components.

Overall, the Royal Purple oil is slightly more expensive but it is highly rated and it the best high performance motor oil for gasoline engines.

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Valvoline SynPower SAE 5W-30

On the other side of the scale, the cheapest synthetic oil that is highly rated is the Valvoline SynPower motor oil. The American owned and operated company have produced the motor oil that meet regulations of the majority of cars in North America.

The SynPower motor oil is fully synthetic and provides improved engine cleanliness through fighting tough sludge and varnish that engines develop over time.

The benefits of using Valvoline SynPower SAE 5W-30 are improving fuel efficiency, high temperature protection under severe driving conditions and cold temperature protection protection through faster oil flow.

Being fully synthetic, you can drive for around 10,000 miles between oil changes and because the Valvoline is cheaper compared to other premium motor oils, it is very popular in the US.

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Synthetic Motor Oil Buying Guide

Oil for your cars engine is an essential. It is not a luxury that you can simply ignore and it must be replaced as per the vehicle servicing schedule. So many car owners avoid the servicing as it is a cost they would like to prevent but the result is a costly repair bill.

Synthetic motor oil is seen as the top rated but some cars may require semi synthetic with low ash ratings. You may also see that some motor oils are dedicated for high mileage cars whereas others are for cold weather.

synthetic motor oil

Difference Between Synthetic and Regular Oil?

Regular car oils are naturally occurring mineral based oil which is refined from crude oil. Regular oils are cheaper, protect the bare minimum of engine components and need to be changed more often.

Synthetic car oils is a combination of man made oil and mineral based or just fully man made oil, which is refined further in chemical plants. Synthetic car oils provide maximum protection for the components of the engine including withstanding higher temperatures than regular oil. The oil costs more than the regular but lasts much longer and provides more protection.

Synthetic car oil can come in two forms, Semi Synthetic and Fully Synthetic. The main difference is that Semi Synthetic oils uses both synthetic and mineral oil and Fully Synthetic oil are fully synthetic with no mineral based oil.

Viscosity Grade

The viscosity grade will be stated on all motor oils that are in the automotive industry. The viscosity of motor oil basically refers to the oils resistance to flow and shear. The best way to describe viscosity is to imagine water and syrup, which are common household liquids. Water has a low viscosity grade whereas syrup has a higher viscosity grade.

With that being said, you need to choose the correct viscosity grade for your motor oil. This will be listed in your vehicles manual but you may choose a different oil based upon the type of driving you do, weather and the age of your vehicle.

For example, if you live in a area that is below freezing the majority of the year, opting for a lower viscosity motor oil is recommended. If you are driving in extremely hot weather, involved in racing or haul heavy loads, you will want a higher viscosity motor oil.

synthetic motor oil

What Happens When You Drive A Car With No Oil?

The piston within the engine will be going up and down very quickly and without the film of oil between the pistons and the bore the car will begin to rattle. This will result in the distance between the crank and the bearing becoming greater and the noise increasing.

After a while, there will be heavy knocking noise from the crankshaft and once you have heard that, the car will break down, the engine will cease and require a new engine rebuild.

The amount of people that do not check the oil in their cars, let alone know where the location of the dipstick is worrying. You should be checking the oil at least once every 3 months. An engine rebuild will set you back around $2000, so its worth the check and topping up when necessary.

How To Check Your Motor Oil

A very simple task that you should be doing at least once every 3 months. To begin, park your car on a level ground so that it doesn’t hinder the results. You will want to have a cold engine so that you do not burn yourself unless its recommended to have it hot by the manufacturer.

Open the bonnet and locate the dipstick that should be clearly visible. Pull the dipstick out of the engine and clean the oil at the end of the stick.

Once clean, place the dipstick back in and then pull it back out. Analyze both sides of the dipstick and check where the oil level is with regards to the dipstick measurement. Usually the indicator will be L to H, Min or Max or a cross hatching.

If the oil is no where to be seen, buy the best synthetic motor oil and place it into the engine. If the oil level is correct, check the color of the oil. The correct color of oil should be brown or black. If you notice any form of metal particles within the oil, this is a worrying sign that their is internal damage within the engine.

How To Check Your Motor Oil

How To Top Up Motor Oil

You will first need to choose the recommended synthetic motor oil for your car which will usually be 5W30 or better. With the oil to hand, locate the oil filler cap that will usually have “oil” marked on the lid or an icon of an oil can.

An important note to make is that you should never overfill with engine oil. It is very harmful to the cars engine, therefore fill small amounts at a time, checking the dipstick regularly.

Start by placing a funnel over the top of the spout and pour the synthetic oil in. Check the dipstick to ensure that the oil level is in correct after each half a quart.

If you find yourself regularly topping up, this could indicate that your car is burning oil or there is an oil leak of some sort.


Using synthetic car oil is essential for ensuring your car will be running at its maximum performance and efficiency as well as protecting the engine components. Around a decade ago, there were only a few synthetic car oils to choose from, but now the variation can be quite confusing. When using synthetic motor oil, its highly recommended that you use a car oil filter for synthetic oil as well to ensure all dirt and debris is filtered.

Some oils provide additional protection for certain parts and some are only for gasoline or diesel engines. It is vital to do your research before spending a large amount of money on oil before your car goes in for a service.

Think of it this way, engine oil is one of the most important aspects of car servicing that you must keep on top of and you only change around every 8,000 miles. For the sake of a few dollars extra you can have the best synthetic oil, which will give you peace of mind that your car will run to its maximum potential and increase the lifetime of vital engine components.

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