Mine takes 3.7l. So 6k should be a good enough interval ? I never paid attention but the new oil filter itself should be filled up with oil before install, right?. I should pay close attention this time on how they change oil. The guys are eager to get the job done, they take the old oil out, pour the new one in and start the car immediately and rev a couple of times. Is this right ? What should i look out for ?