First and foremost,
@starrynight: WELCOME TO BITOG!
Kindly ensure your seatbelt is securely fastened, your center console cover is closed, and your cellphone is not within reach.
Because when you ask that type of question on BITOG, you WILL get a myriad of answers! That doesn’t mean they are all correct.
Part of your responsibility as a member of BITOG is being able to separate the wheat from the chaff. Most times it’s easy but sometimes it can be like herding kittens.
The “search” function is your best friend on BITOG. Read that a second time, then kindly use it lest you incur the wrath of more than one member when you ask a “thick oil versus thin oil” type of question or ask a question that has been answered 6,312 times in the past month or year.
Newbie indoctrination aside, I will vote for @PontiacHO’s post at #15.
You need to get to know your car, particularly what the owner’s manual says about maintenance.
That “complimentary” oil change is to get you into the service bay so they can hopefully sell you on other services.
Once you understand the maintenance requirements of your ride at each “mile marker,” you’ll be in a better position to judge for yourself if you really need that “wallet flush.”
Once again, Welcome! And happy motoring.