Marvels Mystery Oil Added?

I added a quart of Marvels Mystery Oil to my car so I can keep my engine clean and to help quiet my lifter tick. It has done a great job cleaning it as the tick is barely there anymore. But I recently see my car is kicking up a lot of smoke lately from the exhaust. It is white/gray and I have heard it is from cleaning the engine kind of what SeaFoam does. Has anyone tried this?

I also replaced my PCV valve as well and added an additive to my transmission to help it. I love my car, it is a 2000 Ford Focus with a 2.0L SOHC.

Read more: Marvels Mystery Oil Added?