As far as I've discovered, the alfine oil is the same stuff in both the small and large jars. So the large jar makes sense for high-mileage gearboxes, but you don't "break even" till you're doing your fifth oil change.
The downside is that the ongoing oil change intervals are "every 5000 km or every 2 years" so I don't know if the oil will spoil in the same way brake fluid spoils once opened. I'm not prepared to risk that.
The Alfine 11 does come apart for repair, but it is not lubricated this way. I understand that there's grease inside, and this oil somehow "feeds" the existing grease.
The proper Alfine Oil came in a bottle in a bag. The labels are:
Instead you need to buy the proper Shimano TL-S703 tool, which is a bit of pipe and a fitting. And you need a disposable syringe to fit the tube. Instead, I built a replacement.
The later version has a 50 mL barbeque syringe on it instead. 10 mL was too small.
In the middle is the bolt that normally seals the gearbox filler hole. Its really quite short.
So I scrounged an old bolt that had the same thread. Using a combination of drill press, a drill vice, and a small spirit level I drilled a tiny hole right through the center of the bolt. This was widened out to about 5 mm using a series of drill bits. Once that was done, I cut the head off just where the blind hole stopped.
Then I flared the very ends of the holes using a larger drillbit. This was to help the oil flow in better.
The two nuts are tightened together leaving the same amount of thread exposed as the original bolt. Ideally this would be flush with the inside of the casing, but I have no way to tell.
The O rings were simply what I had around. They are optional.
Extracting old oil. Later on I shortened the tube to about 30mm total. A long tube was unhelpful.
Adding the charge of new oil. Here this shows the short tube, and injecting with the hole rotated to the top. Adding 25 mL with three separate shots was a bit silly, hence why V2 has 50 mL BBQ syringes.
To limit cross-contamination, I have a "clean" and a "dirty" syringe, each with their own hose and attachment.
The oil itself goes in a vivid translucent green when new, and comes out grey and stinkier. The old oil is still viscous, and a 5000 km change interval probably reflects shimano's cautious limits, same as tooth capacity counts for their derailleurs.
The oil's odour is hard to describe - its not like any motor oil I've ever used. I'm also familiar with the tang of EP90 gearbox oil, and its as strong in smell intensity but otherwise different.
This gearbox oil smells waxy, with strong hints of vegetable. I cannot think of any other fluid that smells the same.
An oil change takes HOURS mostly because the syringe can only suck the oil that has pooled at the bottom of the housing. So going for a bike ride beforehand is a good idea to warm the oil and make it less viscous.
Disposal: I haven't disposed of the oil yet - not sure that it could go in an oil recovery tank. The quantity is quite small that landfill may be a valid option.