I'd guess it depends on the vehicle, for my five gear and one litre engined mirth mobile I'd reckon that fourth was the most appropriate at that speed for economy and control. Mind you, that's just my impression from driving, don't have any figures that actually confirm greater economy.
Thinker wrote:You can save 20% of your fuel tank
I'm fairly certain that you would save some fuel but 20% seems a bit much for not idling, and would your savings just be transferred to more wear and tear on the starter system - assuming the vehicle is not one of those new ones that turns everything off when stopped. You might also have a delay from starting to actual moving and thus I will be wondering what confusion that car in front of me has with the concept of a green light
As for music, pretty sure I recall seeing a study once that found no issue with listening to the Metal whilst driving, can't for the life of me find it now mind. From my own perspective - acknowledging the questionable nature of memory and after the fact interpretation - I don't recall any difference in my driving with Cradle 'o' Filth or Nightwish on or the silence I now endure after I lost the radio enabling device. All the idiots I come near are certainly not listening to any music at a level I can hear outside the car yet still they drive like clowns. As for classical the slow sonorous stuff might put one to sleep and I don't see much difference between metal and pieces like Mars the Bringer of War by Holst.
Thing is, if you're driving like you're supposed to which means regularly observing your mirrors and environs then the music shouldn't matter, I mean deaf people can drive just fine - bar the presumable one I actually saw signing to a rear seat passenger as the drove.
4 (and most importantly) Have a look at a Hypermiling website as I'll be here all bloody day!
So that's why I encounter folks crawling up to traffic halted at lights even though we all know that they are going to have to stop which they do, then they shuffle a few feet and stop, shuffle another few feet and stop then sit there completely oblivious as the traffic ahead leaves
Hope is but the first step upon the road to disappointment.