411 REFERENCE · Wikibooks
Bicycles/Maintenance and Repair/Suspension/Front suspension lubrication
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
It is best to go to the webpage of your fork's manufacturer and look there for specific information regarding your model and type of suspension fork. If you don't want too much hassle, rather take your bicycle to qualified bicycle mechanic.