Hey guys, bought a TJ II VRX recently, being new to these cars,

needs a service bad, what old am i best using?

car has done 190,000kms

15W40 synthetic enhanced ok? i am doing the filter too, how many litres will i need for a full change?

cheers

That's fine.
Liters, it's listed in the owners handbook, should be around 4.5L region, always confirm by checking the dipstick.
Also, please please search.