The latest Scania 38 and 44 tonners at my work have automatic 12 speed boxes (they're actually automated manuals), and they go into neutral mode every time you lift off the throttle for more than a couple of seconds. They re-engage gear when you press the accelerator or brake pedals. The dash display, which normally says which gear you're in, also displays N. I'm pretty sure the DAFs do the same.
Yes, automated manuals are really just manual boxes where a computer takes over operating the clutch for you and coasting in them is no different to coasting in a manual car. The engine and gearbox are effectively "separated" while the clutch is pushed in (albeit not by your foot). More complex ones (like VW's DSG and Porsche's Tiptronic) have multiple clutches so that they can be in two gears at once, which makes the changes a lot smoother. Even in cars, they can offer slight IMPROVEMENTS in fuel consumption if driven in "economy mode" because you're less likely to ever be in the wrong gear. However, they're generally reckoned to be not quite as smooth as traditional autos when it comes to "creeping" and low speed manoeuvring. Hill starts in particular being trickier, so the luxury car makers often stick with traditional auto boxes.
Er no. I bought a diesel yes. Concerned about the environment no. The geezer with the Jag is concerned about the environment. WallyYou bought a diesel and you're concerned about the environment? Awesome.
Yes, but that's because this thread is also that old.I'd venture to suggest that if you are searching for ways to save such a miniscule amount of fuel you may have chosen the wrong car.
The last time I recall drivers going to such lengths to eke out a tank of fuel was decades ago during petrol rationing
It's a quick way to fail a driving test.
You bought a diesel and you're concerned about the environment? Awesome.
Politicians once said diesels were better for the environment and encouraged their purchase with tax incentives. Believe it was Blair government. Yet people still follow what politicians say without question, even to this day.