Apparently there's multi stage warnings, so one as soon as the temperature starts to go above the normal level, and a different warning when it gets hotter etc.

I suppose Oil Temperature is a more accurate reading of the actual engine temperature... But you need a water temperature gauge, and a dipstick!!

@[ciars] I was doing a bit of research online and 335s generally run hotter, normal operating temperature is anything between 90 - 120