Redline Vs Royal Purple Motor Oil

Redline Vs Royal Purple Motor Oil
Redline Vs Royal Purple Motor Oil

The debate over which oil is better, Royal Purple or Redline, has been going on for years. Some car enthusiasts use Royal Purple for its superior film strength and longer oil change intervals. Others swear by Redline for its top-notch performance and great price. This article will objectively compare two popular gear oils from Royal Purple and Redline.

Redline Vs Royal Purple 

Redline and Royal Purple motor oils are unique in their features. So you need to know about all pros and cons of them before buying either one of them. 

Full-synthetic oil with viscosity 5W30

Full-synthetic oil with viscosity 5W30

Redline oil Recommends 18,000 miles old engine

Royal Purple recommends 12,000 miles old engine

Cold cranking viscosity 6400

Cold cranking viscosity 6300

Superior oxidation resistance

Gives protection against corrosion caused by acids

Ester formula guarantees long lasting engine protection

Enhance engine protection & Oil efficiency.

Improved fuel economy

Increased fuel efficiency

Can be used in passenger cars, light trucks, performance vehicle

Can be used most passenger cars and light trucks

Why Compare?

Motor oil is an undeniably essential element for the health of an automobile. There are numerous motor oils available in the market. There are many types of quality and brands of motor oils for different types of automobiles. So if you go to the market searching for suitable motor oil for your automobile, you might get confused. So it is necessary to have proper knowledge about the differences and similarities among different motor oils. Here you will get a thorough idea about the two famous motor oils- Redline and Royal Purple. 

Change Interval:

The annual replacement cost is different from traditional oils that must be replaced every 5,000 to 7,500 miles. Synthetic oils have a longer service life. Redline requires 18,000 miles and Royal Purple recommends 12,000 miles. The money you spend on car oil depends on how often you change the car oil and how many miles you have to travel with the oil you choose. 

Therefore, if you use Royal Purple, you will spend more money on oil changes than Redline. Therefore, Redline is the clear winner of this round of competition.


Although synthetic oil has a longer service life, it is generally more expensive than ordinary oil. When comparing prices per liter, Royal Purple is cheaper than the redline. So, Royal Purple is a budget-friendly option. 

Total base number: 

The TBN test measures a lubricant’s reserve alkalinity, which adjusts the level of acidity produced in the engine during combustion. As we all know, high TBN engine oil will reduce some of the acid corrosion effects. Redline has a higher content than Royal Purple. This makes Amsoil the superior product. 

Cold start viscosity test:

Engine oil thickness at high or low temperature is directly related to engine start at low temperature. It shows a more leisurely cold start and reduces battery consumption. Also, Royal Purple (6300) gives a better result than Redline (6400).

Nock Volatility Test: 

This test shows the evaporation loss of engine oil at high temperatures. For modern heat engines, this is a valuable test. During the test, the oil was exposed to heat and air to determine how much weight was lost compared to the original weight before heating. Redline’s weight loss effect is less than Royal Purple, making Redline the superior motor oil in this regard.


This test can measure the deposits formed in engine oil at high temperatures. Lubricants tend to accumulate deposits when heated, which reduces overall efficiency and productivity. With the increase in turbocharging and direct injection, it is important to keep deposits on the engine as low as possible. In this test, Royal Purple has a lower rank than Redline. Therefore, Royal Purple is the winner here. 


  • Superior oxidation resistance.
  • Provides better acceleration and lower noise levels.
  • High natural viscosity.
  • Ester formula guarantees long-lasting engine protection.
  • High detergency reduces friction.
  • Expensive.
  • Comparatively low durability.

Royal Purple:

  • Oil efficiency.
  • Gives protection against corrosion caused by acids.
  • Compatible with the most motor vehicle running on ethanol.
  • Enhance engine protection.
  • Protects both gasoline and diesel engines.
  • Expensive.
  • Packaging causes leaks sometimes.

What factors should you consider when deciding the synthetic oil to use?

In contrast to traditional oils, synthetic oils are artificially formulated. As such, they meet the precise wishes of your engine. They include components that include thermal residences and cleansing agents. These decorate the overall performance and safety of your engine. However, all synthetic oils are not the same, and they arrive with exceptional specifications.

Is Royal Purple suitable for daily driving?

Royal Purple HPS oil is very suitable for gasoline and diesel engines. They are unlicensed road performance oils and may not fully meet the warranty requirements of new OEM vehicles because the price of cars is much higher.


Redline and Royal Purple are potential and competing motor oils and their features are also different from each other. You should know about the details of both of them before buying one.

Frequently Asked Questions (FAQ)

If you’re looking for the best possible performance from your car, Redline Oil is a great choice. However, if you’re simply looking for high-quality motor oil that will protect your engine and keep it running smoothly, Royal Purple is a good option. Whichever motor oil you choose, be sure to follow the manufacturer

If you are using Royal Purple oil in your car, you should change it every 3,000 miles or every 3 months, whichever comes first. This will ensure that your car’s engine is getting the best possible protection and performance.
Red Line is a group of synthetic motor oils that are designed to provide superior protection and performance for engines. The oils are formulated with additives that allow them to withstand high temperatures and protect against wear and tear. Red Line oils are available in a variety of viscosities, so you can choose the one that best suits your needs. Whether you’re looking for lightweight oil for your street car or heavy-duty oil for your race car, Red Line has you covered.


RedLine Motor Oil

Royal Purple Oil

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