I have a '97 SSE. I have had a lot of work done lately. Today after pulling off the freeway I noticed my oil pressure guage is moving a lot. It looks like it is moving from about 23 to over 40 when the engine is reved up like normal driving speed in town. Is this what should be happening or should the oil pressure be staying around 40 all the time. I have about 99k miles on this engine and have just replaced, the belt tensioner pulley, the radiator, water pump, the plenum, the transmission sensors, torque converter, power steering reservoir, serpentine belt, fuel guage, rear wheel cylinders, hey a bunch of stuff. Now I notice the oil pressure going up and down.