1. Based on GMTC turbocharge test using SAE 5W-30 2. Based on GMVFE fuel economy test using SAE 0W-20 3. Based on Sequence VH sludge and varnish test using SAE 0W-20 4. Based on Sequence IIIH deposit test using SAE 0W-20 5. Based on Sequence IVB valvetrain wear test using SAE 0W-30.