AMSOIL BEATS MOBIL 1® AND ROYAL PURPLE® IN INDUSTRY-STANDARD TESTING
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.*
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*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.