jzwu,
I have the knowledge to understand that there's no oil on earth that can stay clean past about 5,000 miles. Thats after doing 20 years of oil analysis on most of my cars and learning what works and what does not work. High HP builds. So 5,000 mile oil changes are just smart only if you care about longevity.....especially if one plans to continue ownership beyond the powertrain warranty period. One of my street-strip cars just had the rear end rebuilt after 220,000 miles on it...it was installed on my car in 2002......it was recommended by the manufacturer, Strange, to do it every 30,000 miles. All I did was drain a little fluid periodically and then top it off. Never did a full dump, cleaning and change. Its a sealed system, dirt cannot get in unless you have a bearing failure, so all it needed was a little drained out every year or so and topped off, just because fluids break down over time. I just this year after did a full rebuild on it because it should have about 1,300 RWHP pretty soon after the Procharger F1x kit goes ion, so I wanted to start with a fresh, all new set up. 17 years......they recommended 6 rebuilds and dozens of fluid changes in that time. Unnecessary.......
The 40,000 mile service is 100% unnecessary. People are basically paying $1,600 and higher for Porsche to tell a customer that nothing is wrong with their car on THAT DAY.....the fluid that comes out of ALL 40,000 mile services (NOT engine oil)........is extremely clean and not burnt. Unless the vehicle went through some kind of extreme problem.
The Porsche technician who installed our new Transfer Case and rear driveshaft told me that fluids are sparkling clean when removed and all they really need to do is change the filter......he basically said its just assurance that Porsche will not void your warranty later.
But anyone with a brain knows its a revenue generator because they know they will be paying for warranty work on a lot of cars.....my work was $6,200. And the Macan is a vehicle that has a lot of issues. You either have Macans that have broken down or ones that will break down, while under warranty. Almost impossible for one to not have warranty repairs. Thats why the Fed Gov prohibits dealers from REQUIRING customers to do the service at a dealership. Some dealerships lie to their customers and tell them they MUST do the service at their dealer.....some salesman and service writers don't lie.