Looking for hypoid oil for in the front diff of my sierra cosworth 4x4.

Found out that normal transmission oil like 80W90 doesn't contain the limited slip part. It should be special oil for limited slip differentials, SAE 90 GL-5. (1ltr).

BP has got Energear Limslip SAE 90, but only in 20 ltr containers..

Can't find it anywhere, does someone know a brand that has this??


Cheers, YBJ