Well Mobil oil is easy to find in Europe while greases not. You can find Mobil greases only by huge Mobil dealers - max 2..3 dealers per country. I found my Mobilth SHC from one middle size dealer who was kind to give me few cartridges. While Shell Castrol and KLueber have great network to sell greases
Valvoline Cerulean and Mobil Delvac are fantastic greases for any bicycle application except IGH. The tackiness and water washout resistance make it my choice against any bicycle repacked greases – including phill whoods and Finish line/Teflon or ceramics/.
Some people are confused with tackiness of those greases. They think that tackiness introduces extra friction losses. The experts sais that industrial/truck or marine tacky grease introduces only small initial drag. The friction in real life is dependant on base oil and EP package used.
I don’t have experience with Chevron Delo.
Many people use ATF dope for shimano IGH. The OEM Shimano Nexus grease seem to use such base oil. For grease I would stick to OEM Shimano Nexus grease. A good source for IGH info is
http://hubstripping.wordpress.com/alfine-shimano/
Follow the remarks from Aaron Goss. Hi is professional bike mechanic.
Another professional source is the US based.
http://www.rideyourbike.com/internalgears.shtml
For my shimano IGH I use Mobilith SHC greases, but I have completely disabled and cleaned the hub. This process is
1. Difficult - however shimano offers fantastic PDF manuals. Youtube offers nice films too.
2. Disassembly process of shimano 7 and 8 speed hubs requires special tools and they are expensive. 3 and discounted 4 speed hub can be disassembled without special tools. 11 speed hub is oil lubricated.
I like shimano IGH because they are affordable. I know that they are not perfect and typical japan – they always try to copy the western hubs, improve something and sell at affordable price.
SImano 3,4,7,8 sped hubs have common with English Sturmey-arche and German Sachs – including their design flaws like suboptimal lubrication not sealed. Remember all of them are not MTB approved.
Alfiny 11 just copy the successive idea for oil lubrication from German Ruhlhof.
I wonder when shimano will copy the German Pinion. Maybe some copyright issue stops them for few years.