The difference between Bell Hammer Light, LS Bell Hammer GOLD, and Bell Hammer Seven when used as engine oil additives for cars is the same in effect and aim.
However, the details are as follows
1) The base oil used is different. (The amount of extreme pressure agent is the same)
(2) Bell Hammer Light has better pickup and acceleration, and Bell Hammer Seven has the added vibration prevention effect of organic molybdenum.
(3) The major difference is that Bell Hammer Light is an upper-swing, high-revolution type, LS Bell Hammer GOLD is an intermediate type, and Bell Hammer Seven is a lower-swing, torque type.