Well, I appreciate all of the comments on this but wanted to make sure that my intent is more clearly understood in the question.

The lifeblood of any oil based engine is the oil. Lubrication is one of the essntial keys to engine life, and when looking at an additive that helps to increase/enhance the engine lubrication is a very positive thing. So my question is leading more to the benefits that an additive like this can have on things like reducing engine wear for cold starts etc. over the life of the vehicle.

My nissan used to have a very strange thing happen after having it sit for a week or so, the engine would start a little rough as if it had no lubrication sometimes cutting out and not starting as if it had seized. But when it did start and the oil pump ran for a couple of secs it would be just fine. After the lucas no problems.

So with that being said just wondering if these types of additives were good in prolonging engine life.

Thanks