Where is the center of balance in the body

I assume you're talking about a human body.

The center of mass of the body is inside the abdomen,
straight behind the belt-buckle, half-way to the small of
the back. 

It's slightly higher in men, and slightly lower in women.

Well the magnitude of its acceleration related to that car starts with the oil change like when you have to change the oil in your car you have to make sure that your precious car is starting really propley and very well

What are you trying to ask?