Yes...The Colonel prefers V8's, you are certainly not surprised.
We often have discussions on how economical vehicles are, and the various implications of driving on surface streets, highway, being stuck in traffic, and so on....
Since The Colonel is the V8 proponent, he is well aware that they are reasonably economical on the highway, and not so economical on a surface street, performing errands.
Its interesting to wonder what is the difference.
Let's use Walter as the example.
On a good day Walter will average 9.7 Liters per 100 kms on the highway, some times a little less, other slightly more.
The lingering thought was always how well does Walter do on surface streets from a cold start, idling while the ice is scraped from the windows (as an example)?
Here it is...
Its +3C outside, Walter idled for 3 minutes (warm up, scrape windshield), during idle the fuel economy defaults to 40 Liters per 100 kms. After idling we drove 17 kms on surface streets, with stop signs, traffic lights.
As you can appreciate idling and not moving is totally counter productive to fuel economy; which also explains the increasing popularity of "stop/start" on many vehicles.
We averaged 14.2 liters per 100 kms. a bit of simple math here 14.2 times 0.17 = 2.4 liters of gas on surface streets on the highway to cover the same distance 9.7 times 0.17 = 1.65 liters of gas.
In round numbers that are easier to remember Walter uses 1.5 times the gas on surface streets, short trips, cold starts....lets not even consider being stuck in traffic.
A car with a 4 cylinder would perhaps uses half the gas on surface streets, and very close to the same amount on the highway.
Imagine for a moment way back in the day, The Colonel firing up a 327 with no heat rise passage on the intake manifold on a cold morning, and no choke, or fast idle. A ton of gas going through the carburetor, some making its way to the oil, plugs fouling up, blipping the throttle...
On this day we remember the guy that was in North Africa, spent time as a POW in Tunisia, Camp Florence, and Benicia Arsenal and all the other folks that through the years have served their country.