What gets changed when in service? & costs?

[scooby_si]

Now i came across a thread the other week which had a nice breakdown of rough costs of what should be replaced how often on an FD accept plum mode on & despite doing the lurking thru nearly every thread i cant find it again
So in summary what gets changed when  on the service front? Oil i recall is generally every 3k with filter & plugs were pretty often also but please someone fill in the gaps so i can try to budget suitable amount for servicing a RX& & spend the rest on mods lol
Si