Firstly, Maxjet did not fly single engine from STN accross the atlantic.
Yeoman, do you remember the HLF A300 that landed short, out of gas, at VIE a few years back? They were trying to fly it on one gong from some Greek island to Germany. By my calculations a B762 wouldn't make it westbound to dest on single engine ops. They might make it to YQX - and then it would still be tight.