Friction Reducers
You might find certain additives useful in limited situations. As mentioned elsewhere, parts are oil starved immediately after engine start. Furthermore, very high speed driving will force oil from between parts. Frictional wear is common in these two situations.
If your driving habits consist of many cold engine starts or driving under high loads, consider placing a friction reducing additive in the oil. The key component in these additives is usually a solid lubricant such as graphite or molybdenum disulfide. Some friction reducers use TeflonĀ® as the key ingredient; such types of additives are only used once because of the permanent coating that bonds to the parts. These special lubricants keep the parts separated even when no oil is present.
However, one disadvantage is the additives may give your oil a black or dirty appearance, thus, it would be difficult to perform visual checks on the amount of dirt trapped in the oil. Consult a professional automotive technician before adding a friction reducer to your oil.