In reply to FrankBooth:
What Mountain Bike got roundly criticised once for mentioning using cooking oil inside a certain brand of forks.
The only thing to keep in mind when using grease on other bike parts (than forks), is the density/gloopiness of the grease for how lightweight any internals are, to do with what resistance it might cause for any small/lightweight parts needing to move freely, just a light weight oil is recommended for the internals of SRAM road shifters for example.
http://www.green-oil.net/
Worth buying Green Oil products to help look after the planet though, they're the best out there for being very green and doing a decent job too. Though a good mechanic would probably change any grease a little bit before it's required anyway, if their grease hasn't got gold stars etc on their website from reviews, help to stop any particles/bits suspended in it from causing wear.
Post edited at 01:23