This stuff is great! We use it in all our aircraft, and recommend you do the same.
It's on sale now 'cause we're so excited to be offering it. Buy in one-pint or four-packs.
From the ASL Camguard website:
CamGuard is an additive supplement formulated to address the complex and interrelated problems of corrosion, wear, deposits and seal degradation in piston engines. CamGuard contains 11 high performance additives and is 100% active. It dramatically improves performance of and is compatible with all aviation oils including mineral based, and semi-synthetic types.
In addition to aircraft engines, CamGuard is extremely beneficial for corrosion control when added to the crankcase of any infrequently used engine. These include marine inboard and outboard engines, motorcycle, emergency equipment, backup generators, classic and antique vehicles, agricultural and all seasonal equipment. CamGuard is compatible with all passenger car and heavy-duty diesel oils. This includes synthetic motor oils.