Service Bulletin No. 471 B

Lycoming Engines Oil Additive P/N LW-16702


Supersedes Service Bulletin No. 471A

February 20, 2009


Lycoming TIO-541-and TIGO-541 series engines.


At initial oil fill and every oil change thereafter.

The additive contains an anti-scuffing agent. Laboratory tests indicate that occasionally when an engine is first started, particularly if the engine has not been used for an extended period, during cold weather, for a very brief interval there is insufficient residual oil between moving parts; this can reduce the service life of components. The additive helps to maintain a film of lubricant to help protect the engine during the initial start-up.

Get It Exchanged

Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.