Question about vehicle lubricants

[Greybrick]

Hi,

from a vehicle lubrication discussion talking about low friction and cold weather applications, I was wondering if any know what types of oils or lubricants are used in final drives such as differentials or transaxles on snow machines or other exposed machinery used in the Antarctic, or are external heating systems used with differentials to keep normal brand name -50C to -60C cold-weather oils fluid at -80C or more temperatures? I'm assuming that snow machines have transaxle differentials. Thanks.