Instead: Hydrate with H2O. One of the best measures you can take to avoid kidney stones is to drink plenty of water, leading you to urinate a lot. So, be sure to keep well hydrated, especially when engaging in exercise or activities that cause a lot of sweating. It's Not Just the Oxalate.
You didn't say what year or model BMW. The service intervals vary a huge amount between models a years. BMW built since the mid-1980s have a service indicator. You should change the oil when the service indicator tells you to. On BMWs that specify synthetic oil, you should change the oil when the indicator counts down to zero or once a year whichever comes first.
BMW allows up to 15,000 miles between oil changes, but that is too long to wait to rotate the tires. Unless you drive fewer than about 7,500 miles per year, you should probably rotate tires every six months or so. Related: NHTSA Launches TireWise Safety Campaign The tires mounted on the drive wheels of any vehicle perform extra duty because they apply the power to the pavement.