Help With Lg Gsa-e6on

hello yesterday I bought this drive lg gsa e60n to burn games for xbox360 but I dont get the lower the speed to write because only burns at 4* i want now if is possible the slower the speed to write I am use the verbatim media thanks :bow:

U use 16x Verbaim? I doubt u can burn that media slower than 4x with any actual DVD-writer