Before I swapped back to Pennzoil I was swapping oil filters half way through oci and just refilling filter with Lubegard Biotech Castrol Edge 0w20 brew. Went to use bathroom tonight after visiting local mexican restaurant and "the fan" was a groaning. I had the idea during the torture time to think of a fix. So I went to my stash remembering I had the frankenbrew and apply to the moving parts via Q tip. Its never ran this well and sounds like a harrier jet. I had sprayed wd40 over past,but it never worked.Might even save electricity now as it takes less energy to move the fan?