I have tried to change engine oil at different mileage. 3000km is the best spot.
I am using full synthetic 10W-40 oil.
4000km the oil is a bit too thick. Performance still ok, but engine not so smooth
5000km, the oil is thick already. Performance degraded slightly at top rpm, engine not smooth.
6000km (written in manual book), the oil is damn thick, after oil change the engine feel so light and silent.
I also noticed, oil change beyond 3000km will increase the fuel consumption, decreasing about 10km journey per full tank. When oil becomes thicker, fuel consumption become worse. 6000km change has bad FC, decreasing about 20km journey per full tank. I have a throttle indicator so I know roughly how much I throttle and what FC i will get.
At 3000km, I am just changing the engine oil. Oil filter can be changed every 6000km.
hehe, Bukit Mertajam got ma.
thansk for sharing this info.
I will take this as a reference.
I will wait until my cover "CALAR" a lot and other part getting worst them i will change the cover set, dics brake and gas monoshock.