You should since it increases longevity just like changing engine oil does for the engine.
On your last oil-change service, the service center should have stuck a sticker on your windshield that tells you at what mileage is your next oil change.
It should appear in the little window at the bottom of the speedometer dial. Next to it there should be a push switch to change from odometer mileage to "trip" mileage.
The 3.3L has a chain that does not require regular service.
75,000
100,000
50000
Mileage or once each year.
60, 000 kms
every 6000 kms
90,000 miles
Usually every 3000-5000 miles
if you have an overhead console, just change the mileage intreval due. Press the step button until 0 miles to service is displayed. Press and hold reset until the mileage resets.