AMSOIL Signature Series 5W-30 Synthetic Motor Oil protects against harmful deposits on turbochargers 4X better than Mobil 1 Extended Performance and 3.6X better than Royal Purple in industry-standard testing.*
AMSOIL Signature Series 5W-30 Synthetic Motor Oil was tested against two competing brands to determine its level of protection against deposit formation in high-heat turbocharger applications.
The TEOST 33C test (ASTM D6335) is an industry standard bench test that simulates turbocharger operating conditions. According to the American Society for Testing and Materials (ASTM), it is “designed to predict the high temperature deposit forming tendencies of an engine oil.” To meet the API SN Resource Conserving and ILSAC GF-5 motor oil specifications that are often recommended by vehicle manufacturers, a 5W- 30 motor oil must limit total deposit formation to 30 mg or less.
File photo of extreme conditions, not part of the TEOST 33C test (ASTM D6335) test. Used for illustrative purposes only.
WORLD-CLASS WEAR PROTECTIONCar enthusiasts, engine builders and racers also depend on AMSOIL lubricants to provide world-class wear protection for their vehicles. AMSOIL shields your automobile with 75% more engine protection against horsepower loss and wear than required by a leading industry standard*, extending the life of vital components like pistons and cams.
*As required by a leading industry standard. Based on independent testing of AMSOIL Signature Series 5W-30, in ASTM D7320 as required by API SN specification.
*Based on independent, third-party testing of AMSOIL® Signature Series 5W-30, Mobil1® Extended Performance 5W-30 and Royal Purple® API 5W-30 in the ASTM D6335 bench test required by the API SN Resource Conserving specification.
Test results represent the formulations available as of April 2016. Formulations were coded to eliminate bias during testing and samples were tested in random order. An appropriate number of trials of each oil were run to produce results at or above the 95 percent confidence level when compared to AMSOIL Signature Series 5W-30 Synthetic Motor Oil.
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