I have a buddy who is a VW/Audi mechanic and he drives an A4 1.8 Turbo AWD. He is the first to say that Audi requires lots of maintenance. He bought his with about 80K miles and just before 100k he replaced all the control arms (easier than rebushing them). Timing belt and water pump and reseal the front of the motor. Oil changes were always Mobil 1 0w40. He seafoamed the motor a couple of times because of the reported sludge issues. Audi and VW has a Coil-on Plug replacement program due to high failures of these parts.
I used to own a v8 BMW 530, didn't keep it more than 3 years so no personal experience except for a leaking oil pan, a known issue on that vehicle. Was not happy that I just had the oil changed at the dealership and they hadn't spotted the leaking pan. Still it was fixed without charge but it was one more trip to the dealer.
I used to own a v8 BMW 530, didn't keep it more than 3 years so no personal experience except for a leaking oil pan, a known issue on that vehicle. Was not happy that I just had the oil changed at the dealership and they hadn't spotted the leaking pan. Still it was fixed without charge but it was one more trip to the dealer.