[SV650rules]

I measure the oil in a clear plastic jug with litres and ml marked on it when changing oil (got a set from Aldi ages ago, beats risking the wrath of her indoors by using her kitchen ones LOL). Bike should be vertical and on a horizontal surface (front and rear wheels level ) when checking sight glass for engine / gearbox oil level

I also measure what comes out when changing coolant, and if the same amount does not go back in I know I have air in the system.