For Mehran, using engine flush & feeding LM oil is HIGHLY UNNECESSARY.
Do you think that feeding LM mos2 will start flying mehran and will give 40km/L fuel mileage? No. absolutely no.
Firstly, don't use engine flush for mehran.
Secondly, mehran's manual recommends 10/40 and 20/50 only.
Thirdly, all it needs is only mineral oil. Never try to feed it fully synthetic oils.
Forth, plz choose any of the oils from the list below. Am going to mention them with respect to priority.
SIM3 20/50
Kixx 10/40
PTT 10/40
PTT 20/50
If it reduces the oil 1L/3000Km, then I'll strongly suggest to choose SIM3 or PTT 20/50.
If after using sim3, it doesn't reduce the oil, then keep using it till 5K.
Whereas PTT's oil are good upto 3~4K depending upon driving conditions & engine's health.