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2010-03-05 04:27:01
Finray
Hup! Dos, Tres, Cuatro
+2,629|6197|Catherine Black

Mitch wrote:

jord wrote:

Hi motoring enthusiasts. What with the harsh financial times and being a cheap bastard I've been trying to drive more economically. IE coasting down hills. Does this actually make any differance? I'm also curious about traffic jams. I've been in a few lately and I know turning the ignition off and on probably uses a fair bit of petrol but is it more than the engine running for 30 seconds? What about 60 seconds+? Finally, does using the heater increase fuel consumption?

I await your helpful responses kind fellows.
The heater does NOT increase fuel consumption, however air conditioning DOES.

You have to think of it as RPM's. Racing your car from red light to red light will have higher RPM's which will have increased fuel usage. For example, a moment of your car being at 3000 rpm's uses 3 times as much fuel as that same moment at 1000 rpm's. Hopefully your car has a RPM gauge (tachometer)

So, besides wear on your starter, essentially it would use less fuel if you turned off your motor in a long traffic jam. However its probably a tiny stupid amount not worth the effort.
Revolutions per minute's.

Also, the amount of fuel required to start your car is about the same as the amount needed to idle for at least 1-2 minutes. It's not worth it turning off your engine when you stop.
https://i.imgur.com/qwWEP9F.png
2010-03-05 04:30:30
Finray
Hup! Dos, Tres, Cuatro
+2,629|6197|Catherine Black

Burwhale wrote:

Cruise control also works well, the cars computer should know the minimal amount of throttle to use to keep things going.
http://www.youtube.com/watch?v=GIHdpmTIrFw&#at=160
https://i.imgur.com/qwWEP9F.png
2010-03-05 06:28:04
Sisco
grandmaster league revivalist
+493|6752

Chou wrote:

Sisco10 wrote:

Well, if your car starts up fast and without problems regularly, turning off the engine saves fuel from 30-60 seconds on.
You should tell that shit at your local garage.. I bet they all wanna buy you a beer for good laughs after work.
Looks like they are in for a big round then, cause the ADAC is of the same opinion.
https://www.abload.de/img/bf3-bf2ssig0250wvn.jpg
2010-03-05 06:50:10
DrunkFace
Germans did 911
+427|7090|Disaster Free Zone

ruisleipa wrote:

DrunkFace wrote:

Tips to save fuel.
total 57%?

Seems optimistic.
Its good you know what 'Potential' means.
2010-03-05 07:28:19
CammRobb
Banned
+1,510|6539|Carnoustie MASSIF

Mitch wrote:

The heater does NOT increase fuel consumption, however air conditioning DOES.

You have to think of it as RPM's. Racing your car from red light to red light will have higher RPM's which will have increased fuel usage. For example, a moment of your car being at 3000 rpm's uses 3 times as much fuel as that same moment at 1000 rpm's. Hopefully your car has a RPM gauge (tachometer)

So, besides wear on your starter, essentially it would use less fuel if you turned off your motor in a long traffic jam. However its probably a tiny stupid amount not worth the effort.
Mitch, jesus. The fuel consumption does not increase in pararllel with the rpm you're doing.
2010-03-05 07:47:07
Kurazoo
Pheasant Plucker
+440|7093|West Yorkshire, U.K
Have your boot (trunk) clear of garbage. Install a hydrogen fuel assister.
2010-03-05 10:21:02
13rin
Member
+977|6888

jord wrote:

Hi motoring enthusiasts. What with the harsh financial times and being a cheap bastard I've been trying to drive more economically. IE coasting down hills. Does this actually make any differance? I'm also curious about traffic jams. I've been in a few lately and I know turning the ignition off and on probably uses a fair bit of petrol but is it more than the engine running for 30 seconds? What about 60 seconds+? Finally, does using the heater increase fuel consumption?

I await your helpful responses kind fellows.
It's called Hypermiling... And I hate those guys as I've a talent for getting behind them in traffic.  My jeep gets a whopping 9 miles to the gallon.  I fucking love it.

http://en.wikipedia.org/wiki/Hypermiling
I stood in line for four hours. They better give me a Wal-Mart gift card, or something.  - Rodney Booker, Job Fair attendee.
2010-03-07 04:25:46
Dilbert_X
The X stands for
+1,822|6515|eXtreme to the maX

max wrote:

When you're going downhill in gear, the engine management will cut off fuel supply, and the engine will continue running, being driven by the wheels. At least with modern engines
Fuel will still be supplied, it has to be to maintain 1:1 stoichiometric ratio.

Tips:

1. Maintain tyre pressure on the upper limit. I'm not going to tell you to overpressurise your tyres.

2. Keep your car clean.

3. Part worn tyres have less rolling resistance than new ones, they also have poorer performance in the wet....

4. Don't carry unnecessary weight. Rear seats, spare tyre for example. Bear in mind the spare can form part of the rear impact crash structure. For city driving do you need a full tank all the time? Keep it half full and refill regularly.

5. Driving style. Smooth and anticipatory.

6. Use a quality air filter, should be fine for 5-10 years in the UK but still have half the air induction loss of Halfords crap.

7. Keep the tuning up to spec, and use the right engine oil.

8. Use the right petrol. Supermarket fuel is cheap because its not very good. BP Premium is the most cost-effective for my Subaru.

9. Drive as little as possible.

Using the heater, assuming its water from engine cooling, won't cost anything.

Last edited by Dilbert_X (2010-03-07 04:26:31)

Fuck Israel
2010-03-07 04:27:58
jord
Member
+2,382|7087|The North, beyond the wall.
Thanks, I do most of those, though I think I'm gonna keep my spare wheel in.
2010-03-07 04:30:07
Dilbert_X
The X stands for
+1,822|6515|eXtreme to the maX

Mitch wrote:

You have to think of it as RPM's. Racing your car from red light to red light will have higher RPM's which will have increased fuel usage. For example, a moment of your car being at 3000 rpm's uses 3 times as much fuel as that same moment at 1000 rpm's. Hopefully your car has a RPM gauge (tachometer)
Depends on your throttle position also.
Wide open throttle at 1000 RPM may use more fuel than 20% throttle at 3000 RPM. Changing up early is not always best.

Finray wrote:

Also, the amount of fuel required to start your car is about the same as the amount needed to idle for at least 1-2 minutes.
I'd like to know where this information comes from. May apply to old cars with carbs, chokes etc, much less so than modern cars I think.
Fuck Israel

 

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