First, I need new wiper blades for my 2007 Audi A6 3.2 Quattro. I went to several large, chain auto parts stores like AutoZone and Pep Boys. I was told that they do not have aftermarket replacement wipers for the Audi and that I'd have to buy the blades from a dealer. Is this true? If not, what blades will fit and that do you, as a group, recommend?

Second, I recently had the oil warning light come on. Turns out I needed to add half a quart. I followed the instructions in the owners' manual and added the oil. I'm wondering, is this normai? I just bought the car in February and have only put about 3,000 miles on it since then. It is a certified pre-owned and had just undergone a complete service (including an oil change) when I bought it. None of my previous cars have needed oil so quickly. I am hoping this is normal and not an indication of a major problem with the engine (even with the bumper-to-bumper warranty until 100,000 miles of March of 2013, the hassle of having a major repair would cause me major concerns).

Thanks in advance for the help.