Should I use shaving foam, gel, or oil? Which is recommended for a wet shave?

We recommend shaving gel, foam, or cream over shaving oil.

Shaving oil can build up in the blades and become difficult to clean. As a result, shaving oil should not be used in any 5 head blade. You can use shaving oil with the 3 or 4 head PRO blades, but they should be thoroughly cleaned from time to time.