Haiii.... Iam using suzuki zeus 125 bike clocked 35000kms 2008 model used economically and not more than 55 speed.. my questions follows...

1) In suzuki engine oils, 20W40 - motorcycles, 10W30 - scooters. which engine oil using by suzuki service centers?? Can anybody know about it,also post some images of it???

2) I have used these oil on my zeus engine those are... castrol activ 20w40,tvs tru4 10w30,valvoline champ 4t 20w40,now running is honda 10w30.... every 2000kms changing engine oil, but after changingoil it should be smooth for 1000kms without getting rough and harsh beat right??? 1st,2nd,3rd services after changing oil it was smooth and silent, but now it was not behaving like that/ whats the reason???? Used genuine engine oil and oil filter also same problem.... Rectify it...

3)For SUZUKI LOVERS, please help me out quickly and tell me the problem....
thank you...