i have hero ignitor 125cc, i dont have much knowledge about engine oils. i wanna know that which synthetic oil should i use next time. ???
right now i am usingHero 4-T Plus SAE 10 W 30 SJ(JASO MA), I get a low mileage near to 45 kmpl.

can anyone explain me:-

- what is difference between synthetic & semi synthetic

- which oil i should use for my hero ignitor 125cc

- what is this 10W 30 ? does it matters if i go for 10W 50/40 ? instead of 30 ? (i dont have any knowledge related to this terms i am a newbee )

- if i use synthetic oil what duration should i change it ? how much months/kms ?
- where i can find this synthetic oil in MUMBAI ? (i stay in mira-bhayander)
i am getting very low mileage. hope this change would help me


