I have a 2005 Camry XLE v6 purchased new, I was having a transmission hesitation issue from first to second this is an automatic transmission sometimes not all the time, it was driving me crazy, just by chance in put some Marvel Mystery oil in my gas tank around 6oz drove it the next day and no hesitation I don’t know how it would work on the trans adding it to the gas tank, but it did its a mystery to me.