Are Bell Hammer Seven and Bell Hammer Light the same in content, just in different amounts? Is there a difference in effect between putting 5% and 10% of the engine oil in the engine oil?

1] Differences between “Bell Hammer Seven” and “Bell Hammer Light (for light vehicles)”
Both products differ in their content ingredients and viscosity design.

Bell Hammer Seven" is a high-performance general-purpose model for passenger cars in general, with a well-balanced formula of quietness, wear resistance, and durability.

On the other hand, “Bell Hammer Light (for light cars)” is designed to have a slightly softer kinematic viscosity so that it can easily demonstrate its lubricating effect even at relatively high rpm.
This makes it compatible with the small-displacement, high-revving engines that are common in minicars, and also makes it easy to feel the effects of the lubricant in terms of startability and response.

2】Refer to
for the difference in effect by the amount of addition (5% and 10%). The recommended amount of addition is 5-10% of the total amount of engine oil.

5% addition: It is the standard amount of addition that you can experience the basic performance improvement such as quietness and wear suppression.
10% addition: This is a suitable ratio for those seeking higher lubrication performance, metal protection performance, and engine response improvement, and is recommended for those who want to aim for more aggressive effects.

In consideration of the effect on oil viscosity, we request the maximum amount of 10% to be used.