Too much work.

Yeah pouring a bottle of additive in your motor while your already under the hood adding oil is alot of work... Not to mention grabbing the bottle of additive off the shelf at the part store while your already walking by it to get your oil and filter...

Lol I forgot the sarcasm tag.

I use schaeffers surpreme 7000 20w/50 with extra zinc.

Brad Penn. All day