oil shall be 5w30 spec. Always read owner's manual for engine oil change interval. 5-7000 is usual interval mentioned. Oil filter change is at every alternate oil change. Air cleaner can be cleaned randomly. do not use hi-octane it has different ron rating and not all stations are selling hi-octane of same ron all the time. if you really want to test fuel average use tank to tank method i have learned from this forum. i will try to explain
- visit your choice of fuel station select the machine and top up tank. reset odo meter
- when approx 70 % fuel is used visit the same station same machine and top up again, note the odo meter & fuel quantity poured/
- repeat step 2
calculate the no of liters poured for the no of kms. that is your per liter fuel consumption.