See this post...
What make/model of machine are we talking about here..? What type & viscosity of oil does the machine manufacturer recommend..? What quantity is in the compartment..? What oil are you using now..?
It's for this very reason--the potential for confusion (as illustrated in Nige's response)--that "cross posting" of identical topics in multiple forums is considered poor "netiquette". Please make responses in the thread linked in the opening post. (On edit: Nige's post was quoted to illustrate the potential for confusion, not as an example of wrongdoing on his part.)