Hello, I cannot find a mechanic who seems to know what is going on here. I have 185k miles, 2004 tsx. It's been burning oil for 2 years and steadily getting worse. A quart or more every thousand miles. replaced pcv valve. engine light on due to bad catalytic converter...maybe from unused oil? small ticking/knocking noise that is louder when cold. otherwise runs great. never had timing chain inspected or worked on. never had valve guides checked or anything in the engine checked for that matter. After reading the posts it seems that there are some people on here that are smarter than my mechanics. Please help. Thanks!