Oil Pressure

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My 2006 Nissan Pathfinder started to leave small puddles of oil on the garage floor, but appears to be leaking near the location of where the oil filter is located. I then noticed that the oil pressure gauge stays near the high, and is actually pegged at high when I accelerate. I first thought oil filter was loose, but it was hand tightened pretty tight, and it does not leak the oil all the time