Well, we all talk about 6VE1oil consumption problems.
We've encountered this with the three '99's we've owned.
Recently decided to give Marvel Mystery Oil a try in this regard.
Before my semi - annual oill change ran a quart for approx 300 miles, then did my standard Mobil 1 oil change.
Will miracles never cease. 400 miles later, no oil use to speak of (typically I'd notice it being down almost half a quart at this mileage).
Has anybody else tried this trick? I'd also add that the engine runs quieter and more powerfully (just anecdotally).