Recommended API GL-4 SAE 75W-90 Models before 1996 C140,C141,C150,C153 - 2.4L C52 - 2.6L Models after 1996 C140, C150, C153 - 1.9L C56 (WITH LSD) - 2.2L C56 (Without LSD) - 1.9L C50F - 2.2L API GL-4 may be a minimum requirement as my C50F as a GL-5 sticker on it.