Experiences with Castrol Classic EP90 rear differential oil?

[Berggreen]

Dear All

I am installing a newly serviced 3.69 rear differential / axle in my 1971 280SL, and I am about to fill the differential with new hyponoid oil.

I have bought 3L of the mineral based Castrol Classic EP90 (EP=Extreme Pressure) hyponoid oil, which is a GL-4 SAE90 oil: https://classicoilsshop.co.uk/ep90

German: https://www.xn--csc-oldtimer-l-7pb.de/castrol-classic-ep-90-extreme-pressure-api-gl-4.html
English: https://www.holden.co.uk/p/castrol_classic_gear_oil_ep90_1_litre_

Data sheet: https://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/250E8E524AC63E7380257F4000343B83/$File/BPXE-A6GHZN.pdf

Do any of you have experiences with this rear differential oil, and can you recommend it for the w113?

Thanks,

Christian

[Benz Dr.]

I've been using synthetic gear lube regardless of brand. Just better lube all the way around. I bet most new cars use it now.