I have been very impressed with the chevron supreme synthetic. I have a sample on its way to blackstone for both a voa, and a uoa with about 7500k on it that came out of my accord. The Honda is due a timming belt change and a valve adjustment next week so I will take some photos with the cover off and post. Fill hole looks clean. I also noticed chevron delo now offers synthetic 5w-30, and 0w-30 HDEO. Next time I go to the distributer, I'm gonna get a case of each to add to the stash. For a company that makes there own base oils, and makes there own additives, and owns the rights to the hydrocracking process, can't go wrong with chevron!