Hey guys just bought an 04 audi a6 2.7t s line its got some work done to it. The guy I bought it from suggested I let it warm up before getting getting on it which is understandable but he also told me to let it cool down after a drive by just letting it run for a few min not sure if this is right because my step dad is a 1940 streetrod guy and he looks at me like I'm brain dead and just wanted a second opinion for self reasurance I was also told to run 5w50 full synthetic wondering.if that sounds right too. If anyone could helpr that would be awesome! Thankss