Russia, huh?
Really? How did you get the MDX?
Anyhow, if true, you will destroy the rear differential if you use 90W gear oil. This is more like an 'electronically controlled automatic transmission' then a 'rear differential'. It uses electromagnetic clutches to control the 4 wheel drive. if you look at the fluid it looks very close to ATF. BUT IT IS DIFFERENT.
You should order VTM4 Fluid. Nothing else.
You will need all the other stuff too (air filters, belts, sealing washers, etc) Best to find out where you can get it and have it shipped in. Ask Tim at Hondacuraworld.com how much to ship it FedEx to you. Probably less than US$100.
Heck, I'll bet Japan is the closest to you (of course depends on where you are in Russia)
It's not April 1 anymore, is it?
Ard