My owners manual says that I need 1.2 qt of Hypoid gear oil SAE 90 for lmited slip differentals. All the gear oils that I have looked at (synthetic) dont state that they are for limited slip rears. In fact there are additive tubes that are sold to add to regular oil. What should I use? I want something synthetic. 95 E 300D

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Karl B
95 E300 D
2006 Mazdaspeed 6
2001 GMC Yukon XL
1997 Contour SVT
Mazda RX-7 SCCA race car