Can someone explain something?

dirtydog said:
What does the trip computer say when the car is idling then? Or if you press the clutch or shift into neutral while moving?
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I don't get a live time readout in my current car but in my previous car if you coasted in gear the MPG readout would the figure of the fuel consumption that I was currently getting (usually not very high).


If I was stationary obviously I'd be getting 0mpg. :p
 
dirtydog said:
I don't understand how that can be though. How is the engine functioning if it isn't using any fuel when you lift off? It must be surely.
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The engine isn't functioning under that situation, it's simply being turned over by the momentum of the car.
 
when standing still with the engine running, my mpg drops like a stone. doing no miles and still using fuel, so that makes sense to me
 
Bug One said:
Tommy, you seem obsessed with not 'breaking' your clutch. Using it properly is not going to break it! The thing that knackers clutches quickly is slipping it in with lots of revs. Avoid that, and you'll be fine.

You and your mates sound like you're at that stage of all trying to out do each other with crazy methods of proving who is the better driver. You'll grow out of it. :p Just dont crash and dont drive like a nob. If you're thinking of things like coasting to save fuel, or not changing gear to save the clutch, you guys really should think if you can really afford to be driving!

I nearly always take my car out of gear when I'm sitting at lights etc. Its just generally non-lazy driving. Once its out, you can just sit and relax until you're ready to go. Doesn't take long to put it back in gear. But that might wear out the clutch eh ;) :p
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On the contrary, most of my mates milk the crap out of their cars and rev them as hard as possible to squeeze all the power out. If we were that worried about fuel we wouldn't be doing that. As I said in the OP, I have this one friend who doesn't even pay for his fuel but is still obsessed with saving fuel. Anyhow, I've explained to him why he's actually wasting fuel now so it's settled.

I wasn't saying changing gear damages the clutch. I was asking if you approach a junction in 3rd, and then just slip your foot down on the clutch until you come to a standstill - does that wear the clutch?
 
Malachy said:
how does your car know if its in gear or neutral? it doesnt there is not a gear position sensor you car has no idea whether it is in gear or not so this has no bearing.
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to be pedantic, plenty of cars do have a neutral (inhibitor) switch.
 
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