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Jack
11-08-08, 08:12 PM
this (http://news.bbc.co.uk/1/hi/magazine/7530652.stm) has been my LMFAO of the evening.

Oh deary me...

A petrolhead in a Mini. Ok, I could forgive that. But he's baulking at spending £54 on a tank of fuel - don't get me wrong, I'm sure everyone wants to spend less on the good stuff, but surely a true petrolhead would want the juice no matter the cost? Anyway. Read on.


The idea is that through good maintenance, a more relaxed driving style and cutting out short trips, you can make a difference to the health of the planet - and your wallet.
No short journeys, thats pretty obvious I'd have thought. The less you use your car, the less you have to spend on fuel (and for the tree huggers out there, the less you kill the planet).


"If you've got a 15-year-old Range Rover and you use these techniques, you'll save fuel today."
Confused.com have diversified into fuel saving?


The Magazine's budget does not run to either specialist fuel efficiency gadgetry
Damn. No eco valve ebay resistor chip jobbie slamming then.


First rule of eco-driving - ditch unnecessary weight.
Again, we're talking obvious here.


But I chuck out old car park tickets and receipts, and recycle the accumulated water bottles and drink cans.
I don't really think a few miligrams worth of parking tickets will make a massive difference...


I obey another eco-driving edict - not to brim the tank, as this adds extra weight and reduces fuel efficiency. I pump in 35 litres (the tank holds 40). £41.26 - painful, but not as bad as before.
Why does 35 litres cost £41 when 40 litres costs £54? Hmm.


braking into bends then accelerating out.
As opposed to... accelerating into corners and braking out?


the conditions for getting back to London are a lot more favourable than the trip down - it's later in the day and a Sunday ... our cargo is possibly a smidgeon lighter.
So its already shaping up to be an unfair test. Goodo.


An eco-driver has to read the road
Much like any other driver really.


10 miles per hour under the speed limit is good for the environment and more miserly on fuel.
So 20mph is more economical and better for the environment than 30mph? Incidentally, my celica is more efficient at 70 than it is at 60. Go figure.


My eco-driving checklist says to turn the engine off if you're stationary for more than a minute.
In stop/start traffic or roadworks, this could well prove to be more inefficient than leaving the engine on idle. Not to mention the stress on engine components. Yes, saving £50 a year on fuel would be good, but spending £75 on a new battery each year won't be much assistance.


If you lift off the gas, keeping the car in a high gear, the engine's computer will stop injecting fuel.
Yep, happens all the time. Whenever I let off the accelerator, my car stops taking in fuel. Its just burning air. Honest.


with extra traffic and some frankly bonkers driving by others
...all of whom are probably quite pissed off at this turnip driving 20mph everywhere, taking half a mile to get up to speed and slow down each time he approaches a junction.

I wonder how many people will now be labouring their engines, changing gear at 1800rpm lol

Dar
11-08-08, 08:21 PM
I have changed my driving style and now get about 90mile extra per tank. However it's no fun.




If you lift off the gas, keeping the car in a high gear, the engine's computer will stop injecting fuel.

Yep, happens all the time. Whenever I let off the accelerator, my car stops taking in fuel. Its just burning air. Honest.


Overrun
When I write “overrun,” I mean that the car is in a running gear but there is no accelerator pedal pressure being applied. Under most circumstances the ECU will shut off the fuel supply to the engine, which is then converted into an air compressor. When the engine is in an overrun condition it is effectively using no fuel.

General Baxter
11-08-08, 08:29 PM
I wonder how many people will now be labouring their engines, changing gear at 1800rpm lol


bloody hell thats hi, i change at 1500rpm and still get stupid mpg lol

mowgli
11-08-08, 08:31 PM
yes but you drive a tractor the size of rutland

Ash
11-08-08, 08:34 PM
meh, I the faster I get to where I'm going, the less fuel I use, as I'm not using the car for so long! lol

I was amazed I got 49.7mpg out of a Ocativa TDI the other day and 64mpg out of a Volvo V50 - fooking boring doing it tho... and I spent more time looking at the dash than the road TBH :eek:

General Baxter
11-08-08, 08:40 PM
yes but you drive a tractor the size of rutland

yes but i can save fuel by going as the bird flys lol

mowgli
11-08-08, 08:42 PM
yes but i can save fuel by going as the bird flys lol
you should qualify for a road tax rebate. in fact, get it registered under special vehicles classification & it can run on ribena & only get £175 road tax......

General Baxter
11-08-08, 08:54 PM
well its only 185 for the year anyway lol

meritlover
11-08-08, 09:00 PM
Overrun
When I write “overrun,” I mean that the car is in a running gear but there is no accelerator pedal pressure being applied. Under most circumstances the ECU will shut off the fuel supply to the engine, which is then converted into an air compressor. When the engine is in an overrun condition it is effectively using no fuel.

true to an extent, usually over-run fuel enleanment/fuel cut exists where the conditions are for eg:

rpm less than say 4k and more than 1.5k RPM and load is less than X% and tps less than say 25%. this means that it wont 'hunt' at low speed town driving, but also means that fuel can be cut by y% or cut altogether. usually cutting altogether stops popping and banging in the muffler.

mowgli
11-08-08, 09:02 PM
well its only 185 for the year anyway lol

at the moment............................................ ....................................

General Baxter
11-08-08, 09:04 PM
1998 :p

+ my last mot it was only putting out 0.02Co2 thingys lol

Spudly
11-08-08, 09:12 PM
My weasel cavvy fast passed on emissions on its last mot so therefore is healthier than most, that entitles me to kick it head in and drive faster everywhere cos im not polluting as much as most haha!

Jack
11-08-08, 11:16 PM
Pfft, I had 0.0 hydrocarbons on the last MOT on the Celica. I think the emissions machine was broken lol

Spudly
11-08-08, 11:51 PM
In the words of carlsberg advertising.................... Possibly lol

Alex.
12-08-08, 08:07 AM
Pfft, I had 0.0 hydrocarbons on the last MOT on the Celica. I think the emissions machine was broken lol

Broked!!

Well my car was made before all these regulations, so I'm ok. And my emissions are probably higher then some of yours :p


If you lift off the gas, keeping the car in a high gear, the engine's computer will stop injecting fuel.

Surely if you left your foot too much off the gas then the car wouldn't be happy as you're not giving it enough revs and therefore you'd HAVE to change down otherwise you'd stall?! :tard:


An eco-driver has to read the road
That made me chuckle. Oh yes, because normal people just guess where they're going on the road!

wisewood
12-08-08, 09:27 AM
I dont understand all of these "how to drive economically" things. Why are people too stupid to use trial and error to find the most effective way of driving THEIR car with maximum fuel efficiency?

The fact that this particular one is just laughable aside, they are always a waste of time and effort.

Stuart
12-08-08, 11:04 AM
some of those driving techniques would yield far WORSE mpg than driving "normally"

most manufacturers lean off the fuelling at "cruise" speeds (30, 40,60,70) so driving 10mph below the limit in some cases will work out far far worse lol Plus as the gears are picked to give a tollerable engine speed for X mph then dropping below those speeds will require a bizarr gear choice, resulting in either labouring the funk out of the engine or thrashing its nuts off in a lower gear.

as w00dy said, trial and error on your own part will dictate the econess of your car. Hell I managed 45mpg at 90mph on the way back from the 'Ring lmao

meritlover
12-08-08, 08:09 PM
keeping out of accelleration enrichment conditions and sticking to defined cruise speeds where closed loop mixture control is working is a sure way of ensuring economic driving. in days of electronic controlled throttle bodies and fly-by-wire ECUs driving uneconomically should be almost impossible as the computer defines the air drawn in as well as the fuel injected.