While I'm all for traditional beer units in the UK, it mystifies me that you still use miles but sell gasoline by the litre. I was picked up by a chauffeur at Heathrow to go to Yeovil one morning, and I noticed the sign giving the speed limit. He was driving at 100 mph, however and said "I know where all the speed cameras are". Only time I saw Stonehenge and that lasted a blink!@Dammit I must confess, kilometres confuses the crap out of me. We use mm, cm, m, and once we get past a few 100m we revert to miles.
Same goes with drinks, we buy our milk and soft drinks in ml & litres, but buy our beer in pints and spirits in half or quarter gills - Imperial Gill = 142 millilitres.
It's a Brit Thing!
I find the "62 mph" thing ridiculous. Why does it have to be a round number of km/hr converted to MPH (rhetorical - Eurocrats are a breed ...)The reason we display or fuel in litres is due to EU regulations. It's the same reason why the 0-60mph times changed to 0-62mph as 62mph equates to 100kph.
It's also why our Speedo's display kph as well as mph. Yet mainland Europe registered vehicles don't have to display mph, for those that travel to the UK.
You missed out Cables and Shackles in your Nautical Measurements.
Lynx, Wildcat or Merlin, or all three?
You can't average an "uphill" and "downhill" amount to find the "flat" average. For a variety of reasons. If the amounts averaged to the same, it's a coincidence.Getting back to fuel economy: This is surprising. That's an average of about 36.5 MPG, assuming you took the same route both ways. That's about what I'd expect to get on the level. Of course speed would play a big part of the equation. You must have been light on the throttle.