I use it in my mom's 2005 Jeep Grand Cherokee, and it seems to be working fine.
Go ahead and buy what you can.
Reviews indicate that it is good for differentials, but not ideal for manual transmissions.
Have used it for the past 60,000 mi in the rear of the F250 with a change out 30,000 ago, when opened very very little wear debris and LS still functions flawlessly. Various times has been used as daily driver, horse hauler, hay hauler.
Grab it at that price and don't look back.
RP MaxGear is GREAT stuff. Grab every bottle they have at $5. If you don't want it tell me where to go and I will buy it out.
EDIT - never mind. Hawaii is just a tad too far.
I have run it in tons of trucks and cars and it works great. Every bit as good or better than your other options.
BTW - MaxFilm is another very good product. If you have a boat it works great to lubricate things.