Hot Rod Magazine addressed this problem, June 06. Some very good info there and recommendations on oils to use. ZDDP Content is the major Problem. We all have heard this before but seeing it written again gives credence to the problem. Folks this also applies to General Aviation Aircraft Engines as they have been wearing out cam lobes and lifters. Read this Article! Gene :sw: PS. Thanks to Al Gore and His Wako Friends for causing these problem and brakes too!