Dipstick
Less likely to be misprinted, and accounts for drain variables. There doesn't seem much point in using the manual as the ultimate reference for an oil change if you are going to be using the dipstick for the subsequent oil checks.
Plus the dipstick hasn't been translated from Japanese.
Plus my manuals pages were stuck together because it got wet, and I don't know where it is.
Since it was in Chinese, it probably manages to be ambiguous in the original anyway, and it'd have to be translated into English.