Hello, I'm looking to buy this Audi A5 2.0TFSI 2009 126k km, with STAGE 1 CHIPTUNING (to 260hp) from a dealer and I can also get a 1-year warranty. I read about oil problems and I'm worried that tune may be done because of it. I really like the car but I'm not sure if it's any good. Should I still be interested or move on? What's the worst that can happen?