Chris Mouw

Hi, everybody. I have a 2004 Audi A6 2.7t. I have not had any issues with my car until I changed the oil in it for the first time. I put 0w 40 mobile 1 full synthetic in it. I put 6 quarts in it and started the engine to get all the fluid circulated and shut the engine down after about 30 to 45 seconds. I then put the rest of the .9 quarts or so in to top it off. I started it up again and took it around the block and I now here a knocking sound from the engine. It does not sound like metal hitting metal. But it deffinately wasn't there before. My question is, could this be because of the oil being too light and I need to go up to a 5W 40 or could I have damaged my engine some how?

Chris Mouw

any thoughts would be appreciated.