The Elantra (just over 100K miles) in my sig. is due for a PCV valve replacement ... The car doesn't burn any oil , has always used synthetic oil with OCI's of less than 6K miles and when the oil comes out it's still a dark amber and doesn't smell burnt .
I'm guessing that over time a PCV valve deteriorates in performance leading to engine varnish , sludge , etc. ... I figure a decent maintenance schedule is to clean the PCV valve ever 25K miles and replace at 100K miles ? Lastly , I'm sure (as I) there are a large group of people who never pay attention to their PCV valves ... My only redemption (maybe ) is that I use the latest spec synthetic 5W20 / 5W30 in my vehicles since new and change the oil & oil filter < 6K miles each time . Your thoughts on PCV valve maintenance ?
I'm guessing that over time a PCV valve deteriorates in performance leading to engine varnish , sludge , etc. ... I figure a decent maintenance schedule is to clean the PCV valve ever 25K miles and replace at 100K miles ? Lastly , I'm sure (as I) there are a large group of people who never pay attention to their PCV valves ... My only redemption (maybe ) is that I use the latest spec synthetic 5W20 / 5W30 in my vehicles since new and change the oil & oil filter < 6K miles each time . Your thoughts on PCV valve maintenance ?