mpg per trip or per day

[nigeldodd]

Sorry I'm lazy but I can't find this in the manual. I leave the setting on that gives me accumulated mpg. Sometimes, even after an hour or so, it carries on with the previous mpg accumulated over the previous journey. I don't know what causes it to reset. Is somebody more astute than me, please?

[scanesare]

Think it's around 2 hours max or so since last switching off the engine. If you turn it on again withing this time it continues to log data on top of the previous ones, otherwise it resets.