3 months ago my engine started to make a tapping noise. Not that bad but I decided that night I would take it to the dealership the next day. That morning I was driving to work and I had massive clanging and beating in my engine and total loss of power. I turned her off and coasted into a parking lot and had it towed to a dealership. Now my car is still under full warranty and the dealership blamed the aftermarket oil filter that was put on by the people that changed my oil. I was wondering if any other G20 owners are going through the same thing I went through. Oh and by the way, after two months of fighting, Infiniti covered it finally and put a new engine in. I would appreciate any response and if anyone is going through it then I think I might be able to help you out.