additives are almost always a bad idea to add to new, quality oil
Engineers have designed a stabile formula using the best base stocks and additive packages and you go an add "Magic XYZ" to the mix?
all you do is throw off the balance of the original formula.
Do you go to Whataburger, buy a burger and take it home, scrap off the mustard, onions and pickles, and replace it with ketchup, lettuce and mayo?
In any given quart of motor oil, less than 15 percent of the product is additive, the rest is the base stock.
The additive is blended into the base stock during the manufacturing process to keep it suspended in the base stock. Oil additive packages are things like emulsifiers, zinc for anti wear, detergents, viscosity improvers, and phenols
they are chosen by the manufacture for a reason and blended in a balanced overall formula
when you go buy aftermarket off the shelf super wizard oil additive and dump that crap into brand new oil you run a big risk of throwing off the balance of the additive package that was put there to do a job and you could destroy the capability of the oil to perform like it was intended
now, if you are running low down worn out oil and can't get around to changing it for awhile, I could see dumping some snake oil super fix it in there for a short while, even though I wouldn't do it in my engine.
a lot of these products are all about catching your eye on a TV spot or store shelf
+1 to all that.
Additives suck. Seafoam is something I love and I'd never add it to my oil. It's great for cleaning intake/fuel side stuff, but nothing other than oil should go in your oil.
I can tell you for a fact that Lucas will cause increased foaming in your oil, and all it does that can be considered remotely positive (and only then by ignorant people) is increase the viscosity of your oil.
Until it foams, that is. Air has a rather low viscosity.