What should my pressure be? Make Model Spec BI TURBO. BASE 2.0 V6BI TURBO. BASE E 2.5 V6BI TURBO. BASE E 2.5 V6, (2.0 V6 ITALY ONLY)BI TURBO. BASE S, SII. 2.5 V6 (2.0 V6 ITALY ONLY)BI TURBO. BASE SI. 2.5 V6