I have an oil change coming up and after my first and only oil analysis with MC 5W20 I am going to make a change. A previous car made noise after switching to YB and it also used more oil with that although nothing major. While I am considering trying that again I am also considering alternatives. GTX is out as that has made more noise than anything else in the different cars I have tried it in. My last car called for Quaker State in the manual so I used it and had no complaints but never had a UOA.