Re: Need an A4 or a mechanic...
MMO has its fans but I suspect also a large placebo effect. Added to the gasoline it acts as a "top cylinder lubricant" lubricating the cylinders and the valves in a way that the regular oil doesn't.
But mixed into the oil...there one has to ask, maybe the oil wasn't the right stuff to being with. MMO can't bring or do anything that a quality motor oil couldn't be doing alone.
For the price of a quart it isn't a painful experiment in any case.