To combine both aspects - language and lubrication, I add 3 further links:

http://www.gdnash.com/mixinggreases/

http://www.mobilindustrial.com/ind/english/files/tt-grease-compatibility.pdf

http://machinedesign.com/mechanical-drives/thick-thin

For me, the conclusion is: The best ist not to mix, but to change - but if I have to mix, I will take lithium-grease……



Mike

P.S.: Don`t take this too serious……..