Princess Auto should carry that 36mm socket. As for the oil, I used to use Castrol Syntec which was great. Now I use Amsoil high performance oil for my car now and its excellent.
1997 BMW 540i/6 sport
1984 BMW 733i E23: Centra staggered 16" rims, Hartge strut brace, Hartge engine
1994 BMW 740i E32: Sold