I just bought a used 2007 gs 350 and I noticed when I start the car a very light grey smoke from thr exhaust as well as black soot inside the left exhaust and wet black fluid(oil?) in the right exhaust. Car run great and smooth with great acceleration.starts quickly and engine idles perfectly
right side exhaust wet black oil left side black soot on 2007 Lexus GS350
I would remove spark plugs and inspect the firing tip for deposits and then do a compression test. Is there any cel on?