Is Audi q5l expensive to maintain?

If the 4s shop does maintenance, it will take about 1500 yuan once, and the oil used is not very good. It needs to be maintained twice a year, and it costs more than 3000 yuan to go out for major maintenance. The effect is not good, and the cost performance is not good. Now I am doing maintenance outside the auto repair shop, using imported GT Maroon 5 engine oil with good quality. It's easy to run 15000 km at a time. I change it every year.