In this detailed comparison, we will explore the key differences and performance benefits between Royal Purple and Amsoil synthetic motor oils. We will explore their performance benefits, engine protection capabilities, viscosity ratings, and the additives they contain. By understanding these factors, you can make an informed decision for optimal engine performance.
- Choose the right synthetic oil for your engine to ensure maximum performance and protection.
- Royal Purple and Amsoil are both high-performance lubricants, but they have distinct differences in terms of performance.
- Consider factors such as viscosity ratings, additives, and engine protection capabilities when comparing synthetic oils.
- Amsoil offers superior engine protection and turbocharger deposit protection compared to both Mobil1 and Royal Purple, making it a leading choice among synthetic oils.
- Amsoil ensures extended drain intervals, significantly reducing the frequency of oil changes compared to Royal Purple, highlighting the quality of synthetic oils.
Amsoil’s Turbocharger Deposit Protection
In rigorous industry-standard testing, Amsoil Signature Series 5W-30 Synthetic Motor Oil showcased superior engine protection and turbocharger deposit protection, outperforming both Mobil1 Extended Performance and Royal Purple synthetic oils. Independent, third-party lab results show that Amsoil’s synthetic motor oil held deposits to well under the 30 mg limit recommended by vehicle manufacturers, making it 4 times better than Mobil1 and 3.6 times better than Royal Purple in terms of deposit protection.
Amsoil’s commitment to delivering top-quality synthetic motor oil and engine wear reduction is reinforced through comprehensive industry tests. The results from these tests show that Amsoil stands out by delivering exceptional performance when it comes to preventing harmful deposits on turbochargers. Such robust protection from Amsoil synthetic motor oil ensures the long-term durability and optimal performance of your vehicle’s turbocharger system.
“Amsoil’s synthetic motor oil held deposits to well under the 30 mg limit recommended by vehicle manufacturers, making it 4 times better than Mobil1 and 3.6 times better than Royal Purple in terms of deposit protection.”
To illustrate the differences in deposit protection, here is a comparison of the deposit levels observed in the industry-standard testing:
|Under 30 mg (recommended limit)
|Over 120 mg
|Over 108 mg
This data clearly demonstrates Amsoil’s commitment to providing superior deposit protection, surpassing its competitors in the industry-standard testing. By choosing Amsoil synthetic motor oil, you can have confidence in the long-term health and performance of your turbocharged engine.
Next, we will explore Amsoil’s longer change intervals compared to Royal Purple, allowing you to extend the time between oil changes without compromising engine performance and protection.
Amsoil’s Longer Change Interval
One of the key advantages of using Amsoil synthetic oil over Royal Purple is its longer change interval. Under normal service conditions, Amsoil allows for a change interval of up to 25,000 miles or one year before requiring an oil change. Even under severe service conditions, the change interval is extended to 15,000 miles or one year. These extended drain intervals significantly surpass Royal Purple’s mileage recommendation of 12,000 miles for both normal and severe service, offering a more affordable oil change solution.
Amsoil’s longer change interval not only provides convenience but also helps save time and money by reducing the frequency of oil changes. By utilizing advanced synthetic oil technology, Amsoil is able to provide superior lubrication and protection to the engine components, allowing for extended use without compromising performance.
|Change Interval – Normal Service
|Change Interval – Severe Service
|Up to 25,000 miles or 1 year
|Up to 15,000 miles or 1 year
|12,000 miles or 1 year
|12,000 miles or 1 year
Amsoil’s synthetic oil offers longer change intervals and superior oxidation stability, backed by extensive research, development, and real-world testing. They have been designed to meet the demands of modern engines and provide optimal engine protection even under the most challenging conditions.
Opting for Amsoil synthetic oils and adhering to the recommended oil change intervals allows vehicle owners to ensure peak engine performance, enhanced fuel economy, and reduced maintenance costs.
Royal Purple’s Moly Based Lubricant Technology
Royal Purple sets itself apart in the industry by utilizing molybdenum disulfide (moly) in their oil formulation, which provides enhanced wear protection for engines. However, it’s important to note that Cummins has banned the use of moly due to its potential for excessive valve train wear. While moly-based lubricant technology can offer some benefits, comparative tests have shown that AMSOIL outperforms Royal Purple in terms of wear protection.
A key test used to evaluate wear protection is the ASTM D-4172 Four-Ball Wear Test. This test measures the ability of a lubricant to withstand friction and prevent wear on metal surfaces. In tests comparing wear protection, AMSOIL has demonstrated superior performance against Royal Purple’s 20W50 oil, which is notable given Royal Purple’s reputation in the market.
Moreover, when comparing AMSOIL Dominator Synthetic 15W-50 Racing Oil to Royal Purple 20W50, AMSOIL showed three times better wear protection. This indicates that AMSOIL’s lubricant technology excels in minimizing wear and extending the lifespan of vital engine components.
ASTM D-4172 Four-Ball Wear Test Results Comparison:
|Wear Scar Diameter (mm)
|AMSOIL Dominator Synthetic 15W-50 Racing Oil
|Royal Purple 20W50
As shown in the table above, in the Four Ball Wear Test, Amsoil’s Dominator Synthetic 15W-50 Racing Oil demonstrated significantly better wear protection with smaller wear scars than Royal Purple’s 20W50. These results indicate that AMSOIL’s moly based lubricant technology provides enhanced wear protection, reducing the risk of engine damage and extending the life of critical engine parts.
AMSOIL vs Royal Purple in Third-Party Testing
When it comes to third-party testing, the results consistently show that AMSOIL outperforms Royal Purple in various critical areas. Independent labs have conducted rigorous tests to provide unbiased insights and comparisons between these two synthetic oil brands. Let’s dive into some of the key findings from these tests.
ASTM TEOST 33c Test: Deposit Protection on Turbochargers
The ASTM TEOST 33c test evaluates a synthetic oil’s ability to protect turbochargers from harmful deposits. In this test, AMSOIL’s Signature Series 5W-30 Synthetic Motor Oil has proven its superiority, offering an impressive 3.6 times better protection against deposits on turbochargers compared to Royal Purple.
NOACK Volatility Test: Stability and Evaporation
The NOACK volatility test, a crucial industry benchmark, assesses the evaporation rate of synthetic oils under high-temperature conditions, where Amsoil shows superior oxidation stability. Low volatility rates indicate better stability and reduced oil consumption. In the critical NOACK volatility test, Amsoil’s synthetic oils have consistently demonstrated lower evaporation rates, offering superior engine protection compared to Royal Purple. This suggests that AMSOIL’s synthetic oils are more resistant to evaporation, providing enhanced protection for your engine.
“In various third-party tests, AMSOIL has consistently outperformed Royal Purple, proving its superiority in crucial areas like deposit protection and oil stability.”
These test results clearly highlight the significant advantages of choosing AMSOIL over Royal Purple. By opting for AMSOIL’s high-performance synthetic oils, you can help prevent harmful deposits on your turbocharger and enjoy enhanced stability while minimizing oil consumption. The commitment to excellence in product performance is evident in AMSOIL’s consistent outperformance in independent third-party testing.
AMSOIL’s Performance in Four Ball Wear Test
In the Four Ball Wear Test, an industry-standard test to determine wear protection,
AMSOIL consistently outperformed Royal Purple. Test results showed that AMSOIL’s Signature Series synthetic oils had smaller wear scars compared to Royal Purple’s oils. This means that AMSOIL provides superior wear protection, reducing the potential for engine damage.
AMSOIL’s advanced lubricant performance in the Four Ball Wear Test demonstrates its commitment to delivering top-notch engine protection and longevity.
Comparative Four Ball Wear Test Results:
|Wear Scar Diameter (mm)
|AMSOIL Signature Series
The table above presents a clear comparison of the wear scar diameters obtained from the Four Ball Wear Test:
- AMSOIL Signature Series: 0.28mm
- Royal Purple: 0.36mm
As evident from these results, AMSOIL’s wear scar diameter is significantly smaller than that of Royal Purple, indicating its superior lubricant performance and enhanced ability to protect critical engine components.
Cold Cranking Viscosity Test Results
The Cold Cranking Viscosity Test is a crucial measure of an oil’s flowability at low temperatures. It determines how well the oil performs in starting engines during cold weather conditions. The results of this test provide valuable insights into the effectiveness of different oils in cold start situations.
In the context of the comparison between Amsoil and Royal Purple, both oils underwent the Cold Cranking Viscosity Test to assess their performance in cold weather conditions.
|2nd to last
According to the test results, Amsoil demonstrated superior performance, ranking first in the Cold Cranking Viscosity Test. This outcome showcases Amsoil’s excellent flowability and effectiveness in starting engines even in extremely cold conditions.
On the other hand, Royal Purple ranked second to last in the same test, suggesting that it may have slower flowability at low temperatures. This can potentially impact engine start-up, especially when faced with harsh winter climates.
Therefore, when it comes to the performance in cold weather conditions, Amsoil stands out as the preferred choice due to its top-ranking result in the Cold Cranking Viscosity Test.
NOACK Volatility Test Comparison
The NOACK volatility test is an essential measure of an oil’s performance under high-temperature conditions. It determines the oil’s resistance to evaporation, with lower volatility rates indicating superior performance and enhanced engine protection. In this test, AMSOIL’s synthetic motor oils have demonstrated lower evaporation rates compared to Royal Purple, solidifying its reputation as a trusted brand in the industry.
AMSOIL’s commitment to producing high-quality synthetic oils is evident in its performance in the NOACK volatility test. The results highlight AMSOIL’s ability to withstand high temperatures without evaporating as readily as Royal Purple, ensuring better oil stability and prolonged engine protection.
In the NOACK volatility test, AMSOIL has consistently shown lower evaporation rates, implying better resistance to oil breakdown and degradation. This is crucial for maintaining optimal engine performance, reducing oil consumption, and preventing engine wear and damage.
By choosing AMSOIL over Royal Purple, you can trust that your engine will benefit from oils with lower volatility rates, leading to enhanced protection and prolonged engine life.
|Lower volatility rates
|Higher volatility rates
AMSOIL’s Total Base Number Test
The Total Base Number (TBN) test is an essential measure of an oil’s ability to neutralize acids that form inside the engine. When it comes to motor oil quality, AMSOIL’s synthetic oils excel in the TBN test, providing superior acid corrosion protection compared to Royal Purple.
The Total Base Number (TBN) test determines the oil’s alkaline reserve, which is crucial for combating the corrosive effects of acids produced during combustion. AMSOIL’s synthetic oils have higher TBN numbers, indicating their superior ability to neutralize and control acid formation.
By using AMSOIL synthetic oils with higher TBN numbers, you can prevent acid-related damage and corrosion to vital engine components, ensuring longer-lasting protection and optimal motor oil quality.
AMSOIL’s commitment to superior motor oil quality and acid corrosion protection is further exemplified in this Total Base Number (TBN) test comparison.
Comparison of TBN Numbers
Motor Oil Brand TBN Number AMSOIL 10.1 Royal Purple 8.2
As shown in the table, AMSOIL’s TBN number of 10.1 surpasses Royal Purple’s TBN number of 8.2. This significant difference indicates that AMSOIL not only provides excellent acid neutralization but also offers enhanced motor oil quality and protection against acid-related corrosion.
By choosing AMSOIL synthetic oils with higher TBN numbers, you can trust that your engine will receive the utmost protection, ensuring its longevity and performance.
With AMSOIL’s advanced motor oil technology and superior acid corrosion protection, you can confidently drive knowing that your engine is safeguarded against harmful acids. Optimize your engine’s performance and longevity with AMSOIL synthetic oils that consistently exceed industry standards and deliver unmatched motor oil quality.
After conducting a comprehensive comparison of Royal Purple and Amsoil synthetic oils, it is evident that Amsoil emerges as the superior choice for engine protection and performance. Through various tests, Amsoil consistently outperforms Royal Purple, showcasing its superiority in delivering exceptional results.
One notable advantage of Amsoil is its longer change intervals, allowing drivers to go up to 25,000 miles or one year before requiring an oil change under normal service conditions. In comparison, Royal Purple’s change interval is shorter at 12,000 miles for both normal and severe service.
Furthermore, Amsoil excels in independent, third-party laboratory testing. It demonstrates better protection against harmful deposits on turbochargers compared to Royal Purple, surpassing both Mobil1 Extended Performance and Royal Purple in this aspect. AMSOIL’s synthetic motor oil, recognized for its superior oxidation stability, exhibits lower NOACK volatility rates and higher Total Base Number (TBN) scores, indicating unmatched resistance to evaporation and enhanced acid corrosion protection.
By selecting Amsoil synthetic oil, renowned for its engine wear reduction and fuel economy improvement, you ensure optimal engine performance and protection, thereby extending the life of your engine. With its proven track record and industry-leading performance, Considering engine wear and fuel economy, Amsoil emerges as the best synthetic motor oil choice when compared to Royal Purple.
What are the key differences between Royal Purple and Amsoil synthetic oils?
The key differences between Royal Purple and Amsoil synthetic oils lie in their performance benefits, engine protection capabilities, viscosity ratings, and the additives they contain.
How does Amsoil compare to other synthetic oils in terms of turbocharger deposit protection?
In industry-standard testing, Amsoil Signature Series 5W-30 Synthetic Motor Oil demonstrated superior protection against harmful deposits on turbochargers compared to both Mobil1 Extended Performance and Royal Purple.
Does Amsoil offer a longer change interval compared to Royal Purple?
Yes, Amsoil synthetic oil offers a longer change interval. Under normal service conditions, it can go up to 25,000 miles or one year before requiring an oil change, whereas Royal Purple’s change interval is 12,000 miles for both normal and severe service.
What differentiates Royal Purple from Amsoil in terms of lubricant technology?
Royal Purple differentiates itself by using molybdenum disulfide (moly) in their oil, which is banned by Cummins due to its potential for excessive valve train wear.
How does Amsoil perform in third-party testing compared to Royal Purple?
Third-party testing conducted by independent labs consistently shows that Amsoil outperforms Royal Purple in various tests, including the ASTM TEOST 33c test and the NOACK volatility test.
How does Amsoil perform in the Four Ball Wear Test?
In the industry-standard Four Ball Wear Test, Amsoil consistently outperforms Royal Purple, with smaller wear scars, indicating superior wear protection and reduced potential for engine damage.
How do Amsoil and Royal Purple compare in the Cold Cranking Viscosity Test?
Amsoil ranked first in the Cold Cranking Viscosity Test, indicating superior performance in starting engines in cold weather conditions. Royal Purple, on the other hand, ranked second to last in this test, suggesting slower flowability at low temperatures.
How do Amsoil and Royal Purple compare in the NOACK Volatility Test?
The NOACK Volatility Test showed that Amsoil’s synthetic motor oils demonstrated lower evaporation rates compared to Royal Purple, indicating better resistance to oil evaporation and greater engine protection.
How does Amsoil perform in the Total Base Number (TBN) Test compared to Royal Purple?
Amsoil’s synthetic oils have higher TBN numbers compared to Royal Purple, indicating better acid corrosion protection and a longer-lasting ability to neutralize acids formed inside the engine.
Which synthetic oil emerges as the better choice for engine protection and performance?
Based on the comprehensive comparison, Amsoil emerges as the superior choice for engine protection and performance due to its consistently superior performance in various tests, longer change intervals, and better acid corrosion protection.