SR5- OK, I'm going to try that first, along with some Liqui Moly MoS2 from NAPA. We'll see how it goes. If I can, I'll put in like 4.5, 4.75 quarts (I have 5 qt system) w/o the MoS2, run it for a week or so, and see what the noise is like. Then put the MoS2 and the rest of the oil in, then see...