this video has info on how to fix a severe valve tap or sticky lifter using 1 quart of automatic transmission fluid with 4 quarts of oil. the trans fluid is a high detergent that loosens up sludge build up in a motor from lack of oil changes, you will be amazed at what pouring 1 quart of trans fluid in a neglected motor can do. the truck in this video got a double treatment and now runs smooth with no taps and the check engine light went out as soon as I started it. also after the second treatment I changed the oil & filter and the clumps of sludge that were left in it broke down into the oil from the trans fluid and it flushed it out. I
I realize I bash fram oil filters in this video and any filter wouldnt have helped in this case because the truck was so neglected any filter would have pluged up. howerver,,, Fram in my opinion is cheap crap.and over the years of having hundreads of cars I can honestly say if you have 2 identical engines 1 using Fram the other using Wix or Napa the Fram motor will die prematurely due to lack of filtering.