Ask me in two years.
Like some cars, the M5 needs oil to be topped off between oil changes. No biggie. However, I have put about 1000 on the car now, and it is already asking for oil. OK, I will stop and buy some. Noooooo. O'Reilly doesn't carry 10W-60 apparently. I can either order on the internet, or buy from the dealer.
Ho boy.