MotorSilk Marine Engine Oil Additive 16Fl oz
MotorSilk CLS Marine Engine Oil Additive is a permanent engine oil additive designed to last over a 1000 hours. Since you add it so seldom. This is an active formulation and should be well mixed prior to using.
If it is used between changes, add it at least a 100 hours prior to your next oil change to avoid draining before the bonding takes place.
The engine should run smoother and quieter after treatment.