Fram
I just made a 180 mile trip last Wednesday (Oct. 15) and when I got off the highway the engine ran fine but I heard a noise that sounded like a water valve opening and closing, kind of a thumping. This is in a Nissan Sentra 4 cylinder. I had earlier read this thread and it was fresh in my mind. The noise was coming from the area where the oil filter is located. It was a Fram. So I had the filter replaced at a Firestone dealer since that was the nearest garage and it requires the car to be way up in the air to facilitate removal of the filter. It is between the firewall and the block under the intake manifold. Needless to say, the noise is gone. I will never use Fram filters again. I got away cheap. In a racecar, I seriously doubt you could have heard the noise that it made. If you have a Fram oil filter, I would highly recommend changing it immediately.