Add 100-150 grams for the gear box, another 100-150 gms for the transfer case, 150 grams each for the differentials - what i did for my mm540.
you can see the difference only after 100kms of running.
if you are cruising at 60-70kmph speed on the highways, shift abruptly to neautral and let the vehicle coast freely. my mm540 goes a full km before the speedo dips in speed. check this and pls inform me on your updates.
for the engine , do as what you had suggested. add 100gms for 1/2 litre engine oil and add, run the engine, let it heatup fully - then drive for atleast 50-80kms and then see the difference. for my mm540, i added 300gms powder in one litre engine oil, added it to the engine and then drove nonstop for some 200kms and after that trip, till now, my engine revs so freely, that some cars look at me in awe when i overtake them, which is a little unusual for a jeep. the buildup of speed - you can understand.
lastly open the top cover, in engine, (valve door), see if any residues and remove them, some powder can get stuck in valve springs looking like grease.