There is a lot more to car and truck maintenance than just changing the oil. Changing the oil and oil filter using the correct viscosity of oil and correct service level of oil and the proper oil filter is probably the most importantce maintenance however. You need to change the oil filter whenever necessary, check the tires and air them up when necessary, change automatic transmission fluid, etc. A considerable amount of general maintenance studd can be done by the owner.
There are a lot of people who buy a car or truck and than do not perform the proper maintenance. But I don't know if you can rely on getting the proper maintenance at places like JL. I can change my own air filter, change my own oil and oil filter element, air up my own tires, wash and wax my own car. And I save money and feel better doing it myself. I know I am using the proper viscosity and type of oil, I know I am using the correct oil filter element and that the oil filter element is in fact being changed with the oil, and I know that if I put synthetic oil in the car there is in fact synthetic oil in the car and not conventional motor oil.