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Signature Series Synthetic Motor Oil Outperforms Competition in New Study

INE SYNTHETIC MOTOR OILS were compared to AMSOIL Signature Series 5W-30 Synthetic Motor Oil (ASL). When it was all said and done, Signature Series demonstrated the best overall performance and cost-effectiveness. Since AMSOIL introduced the first synthetic motor oil to meet American Petroleum Institute (API) service requirements in 1972, many other synthetic motor oil brands have been introduced. Today, synthetics are widely viewed as superior to conventional motor oils, and demand continues growing, but how do other brands compare to AMSOIL?

A Study of SAE 5W-30 Synthetic Motor Oils
Signature Series 5W-30 Synthetic Motor Oil and nine other synthetic oils were subjected to five industry tests conducted according to American Society of Testing and Materials (ASTM) methodology. The overall annual cost of each oil was also compared. The study included synthetic motor oils exclusively for a number of reasons. First, most motorists now understand that synthetics provide increased performance benefits compared to conventional oils, so convincing consumers of synthetics' superiority is less of an issue. Second, while conventional motor oil sales remain flat, demand for synthetics continues to increase. Third, testing only synthetics facilitates an applesto- apples comparison.

Testing examined several important areas of motor oil performance, including resistance to deposit formation, wear protection, high-temperature stability, resistance to acid formation and coldtemperature performance.

Each oil was subjected to the following ASTM test methodologies:

  • Thermo-Oxidation Engine Oil Simulation Test (TEOST, ASTM D 6335)
  • NOACK Volatility Test (ASTM D 5800)
  • Four-Ball Wear Test (ASTM D 4172 Mod.)
  • Total Base Number (ASTM D 2896)
  • Cold Cranking Viscosity (ASTM D 5293)
Test results published in A Study of SAE 5W-30 Synthetic Motor Oils describe and represent properties of oils that were acquired from November 2012 to December 2012. Results do not apply to any subsequent reformulations of such oils or to new oils introduced after completion of testing. All oils were available to consumers at the time of purchase. An independent, third-party lab conducted all tests. Formulations were coded to reduce the potential for bias, and samples were tested in random order. An appropriate number of trials of each oil were run to produce results at the 95 percent confidence level when compared to Signature Series Synthetic Motor Oil. The 95 percent confidence level only applies when comparing AMSOIL Signature Series Synthetic Motor Oil to the other 5W-30 oils. The 95 percent confidence level does not apply when comparing the other oils to one another.

Candidate Oils
The following nine oils were selected for the study:

  • Castrol Edge® with Titanium Fluid Strength Technology®
  • Lucas Synthetic
  • Mobil 1â„¢ Extended Performance
  • Pennzoil Ultra™
  • Petro-Canada SUPREME Synthetic™
  • Quaker State Ultimate Durability™
  • Red Line High Performance Motor Oil
  • Royal Purple High Performance Motor Oil
  • Valvoline SynPower® Full Synthetic Motor Oil

All oils are 5W-30 viscosity and recommended for applications requiring API SN/ILSAC GF-5 specifications.

AMSOIL Signature Series Synthetic Motor Oil displayed the best results in the Four-Ball Wear, Total Base Number and Cold Crank Viscosity Tests. Results in the NOACK and TEOST Tests were also impressive, proving Signature Series Synthetic Motor Oil's excellent high-temperature performance. Other oils performed well in some tests, but not as well in others, illustrating the challenge inherent in formulating a high-quality motor oil that performs well in tests designed to assess optimum engine protection and life. In addition to delivering outstanding performance, Signature Series Synthetic Motor Oil provides maximum cost-effectiveness - even at retail pricing. In the end, no other oil demonstrated itself capable of providing the overall performance in these tests and costeffectiveness of Signature Series.

Copyright © 2010 All Synthetics Group. All Rights Reserved.

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