Good day!!
First off, what are we working with? It might help us help you if you had all the vehicles you deal with in the signature block... You never have to worry about including the information in any posts again...
Unless a limited slip was actually custom added to your X5, no matter the year or motor size, you don't need LSD fluid... I think BMW uses 75W90... I'm going to check really quick... Be right back...
https://www.google.com/search?q=8322...&bih=924&dpr=1
Yep... OEM stuff comes in liter bottles... You can use the equivalent full synthetic version from any quality names... Mobil 1 is the stuff I use...
Cheers!!!