Ran for a little over 3k on the girlfriends Volvo. The factory recommended interval is 7.5k, but I am trying to clean things up. The car is the "turbo'd" version and is severely short tripped. After removing the filter from the previous oil change, a few of the pleats were packed with sludge. This one had a little bit at the edges, but the synthetic seems to be clearing things up. Pennzoil Platinum 5w30 came out and M1 AFE 0w30 went back in.