This oil (or Liquid Gold?) is perhaps the most hotly contested maintenance fluid on the Toyota forums (virgin analysis can be found here: Toyota 75W T-Case Oil). The manual calls it out specifically, and there seems to be no dead-set answer on what an acceptable alternative is. Most dealers don't even know about it when you call the parts department, and the service department says bulk 75W-90 is what they put in there with no issue (this is based on my converstaions with dealers, as well as experience of many others). To top it off, the parts department wants $90/L to order it in (I need 1.5L) or it can be found online for maybe $65/L. I feel like my wife's 2012 4Runner Limited is due for a change of the factory fill at 80K+ miles, so I'm on the hunt for an acceptable alternative. I've already got my M1 75W-90 for the diffs, and all I need now if this dang T-case oil! I've spent hours searching this topic, so I figure I'd ask the experts here. Is it stupid of me to try to save $100 on this oil, or do you think there is a now a viable aftermarket option? The three I've been looking at are: - Ravenol MTF-3 - Royal Purple Synchromax - Red Line MT-LV What do you think is the most robust oil out of the above? I truly appreciate any input y'all have!