# EP-Additives

> [HTML Version](ep-additives.html)

If the lubricant contains effective EP-additives, the life modification factor aISO may be calculated using k=1 in case of k<1 and eC>=0.2 and k>=klim. 

A (./images/all_img3.png)-button allows to increase k also in case eC<0.2, if the option "Efficiency of EP-additives is proven in actual application" is checked. For very small k no increase is done. The default limit is set to klim=0.1, but it can be changed to other values, based on experience.

**(./images/RBC-EP-additives.png)**