Originally Posted by lkchris
Castrol SAF-XO is a specially formulated full synthetic. There are no "equivalents" and yes, it's not available at WalMart. USA availability is only at BMW and Land Rover dealers.
BTW, this oil is not now nor has it ever been recommended for the transmission--just the final drive.
Strange, looking at their site, SAF XO is now SYNTRAX " a GL-5 lubricant compatible with all GL-5's"
GL-5 can be bought....ANYWHERE.
PS...SAF XO and XJ are European designations. May explain the scarcity here...ie..dealer only