Aftermarket oil additives are not needed in ANY PROPERLY FORMULATED oil... ... ... PERIOD! All OIL Companies formulate their oils to SPECIFIC standards for SPECIFIC applications, and therefore do not need ANY aftermarket oil additives. These Oil Companies spend literary THOUSANDS of DOLLARS to get the the oils to pass specific tests for specific applications, like the CUMMINS SPEC. 20081 and the MACK EO-O Premium Plus, and many others. when you ADD ANY AFTERMARKET oil additive, this can UPSET the CHEMISTRY of the FULLY formulated oil, and can cause problems! There is NO OIL COMPANY that will tell you to ADD EXTRA oil additives! AMSOIL INC. for example will VOID their warranty if an aftermarket oil additive is found in their oils, which would be found by doing (UOA) Used engine oil analysis, in the event of a SUSPECTED OIL FAILURE. I'm sure other oil Companies would do the same, including "ROTELLA".
BOTTOM LINE... ... ... ... The only ones that benefits are the OIL ADDITIVE COMPANIES.