Right, I've been reading this forum for about three years and finally worked up the courage to post my own experience. This happened to me in March 1998, and I've never really talked about it properly until now.
I was driving back from my girlfriend's place in Carlisle to Manchester around 11 PM. Clear night, decent visibility, bit cold. The A66 was basically empty. I remember passing through Penrith and thinking I'd be home by 1:30 AM. Next thing I properly remember is pulling into a service station near Stockport and the clock said 5:47 AM. My watch said the same. My petrol gauge showed I'd only used about a quarter tank, which made no sense - I should've needed a full tank for that kind of driving.
I've never had epilepsy or blackouts. I don't drink and drive. My car was completely fine, no damage, nothing weird. But I genuinely cannot account for those hours. My girlfriend at the time thought I was taking the piss, and I haven't mentioned it to anyone else except my wife, who basically tells me not to be daft. But something happened that night, and I'd like to hear if anyone else has had similar "missing time" experiences, especially on that stretch of road.