[newday777]

Yes welcome to the forum chief77,
It needs changed yearly.
Are you asking of which fork oil to use or how to do it?
You'll need to include a bit more info as to your riding style, sporty or soft mushy ride, payload, Progressive springs or stock springs?

 

[newday777]

You will be amazed how bad it gets in a year and as low as 5,000 miles. Mileage, moisture, heat, road conditions and fork oil used all play into the equation.