I brought my 98 CRV in for an oil change and he strongly suggested I do a valve adjustment because they tend to tighten up and burn in this engine. This struck me as strange for a few reasons. I had a 89 civic si and sold it with 180,000 miles on it. In all that time I think the valves were adjusted once. It was still running like a clock when I sold it with no apparent signs of valve trouble. I mention that because I believe the CRV has basically the same engine. I also thought that valves would only loosen up with time and wear; not tighten. Is my logic sound or is there some truth to what I was told??? Thanks. Alex