I do. I change my conventional oil annually or 7500 miles, whichever comes first. And I'm rarely on time either, so it's usually closer to 9k. Anyway, what I do is irrelevant. My question is-- why are so many of you hesitant to run your conventional oil for longer intervals? I constantly read about BITOGers change their conventional oil at 5k. Some even at 3k. It makes me cringe to read how wasteful some of you are. Conventional oils have improved significantly over the last few decades, especially over these last few years. OEMs have been specifying 7500 mile intervals for normal service for well over a decade now. Now, unless you drive a vehicle that is a notorious sludger, or your driving style involves "grandma duty," if your OEM allows for a 7500 mile interval on conventional oil under normal service, what's your excuse for not following it?