My 05 civic engine is noisy. Ive adjusted valves nothing is wrong. I guess its just the solid valvetrain a few honda guys say there car makes the same noise and it gets louder as the engine warms up. So my question is what oil could I use to reduce noise. I dont mind going thicker. It Is running 5w20 but I hate the thought of oil that thin. What should I use? Thanks guys its non vtec as well.