Hi, I'm using Suzuki smash Revo 110.
For the last 2 months, I'm riding 100km a day to work. As per title, my engine oil keeps running out and I have to top up to 200ml a week. I checked for possible leakage but cannot find any.
Is it normal that my motor loose 200ml a week from long distance journey?
How to minimize this loss?
Engine oil that I used before
Shell Advance SAE 40
Castrol Activ 20W-40
Petronas Sprinta F700 15w-50 - currently use but no different
Engine oil kering without dripping