Owner's manual schedule is @2500 miles between changes using 90# oil.
I do them about every 1000 miles.
Today used Valvoline full synth. 75/90W.
Removed a bit under 200ml. Poured the same into the cup, and injected like amount into the ol' LIKE200iLX.
I clean things up before starting....
Weapon of choice (works much better than cheap syringes I've tried)
That old felon Martha S. developed this while she was doing hard time. Thanks Marty!
One last thing - I
never use a torque wrench on gear oil, engine oil, exhaust studs or spark plug changes.
I just use a light touch, short ratchet & common sense.....
Stig