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1Based on independent testing in the ASTM D6891 test using 0W-20 as worst-case representation.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.
3Based on independent testing of AMSOIL Signature Series 5w-30 motor oil in the LSPI engine test as required for the GM dexos 1® Gen 2 specification.
4vs. AMSOIL OE Motor Oil
5Based on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.