Poor MPG

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Poor MPG

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Chaz

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My MPG is really bad recently its gone down to (i think if ive done my sums properly) around 22 MPG in a 1.8 HLX s reg ive been going from derby to loughborough and back every day recently which is about 40 mile round trip. How can i improve it what could be wrong? oh and i dont drive like a knob cruise on the dual carriage way at 70/75 most of the time!
 
I've got a 1.8 ELX Marea and I get 35+ mpg on average, so there must be something wrong somewhere. If you have climate control or air con, that'll affect it but not by that much.

I think a bit of an investigation is due.

Rob
Marea Weekend 1.8 16v 115 ELX
 
Have air con but dont use it because im scared about it using even more petrol! its costing me a fortune!
 
just so i no im not being an idiot im getting around 75 miles from £10 of petrol.
 
yeah so do i1 maybe i just have to live with never being able to afford petrol then! at least i dont have a 1.4. think i will fill it up when i get paid and see how many miles i get out of a full tank! cheers rob
 
Last time I checked, I got about 480 miles from £50, using the climate control every now and again. Given that my Marea is bigger and heavier, you should get a bit more than that.

If you scroll down that page I linked to, there are a lot of useful hints on how to save fuel and make it last longer. Worth a read :)

Rob
Marea Weekend 1.8 16v 115 ELX
 
Ive had to resort to putting the car into neutral and coasting down hills to improve the fuel consumption on my 1.4, I love the car to pieces but HATE the MPG.
 
Yeah i do that as well and coast up to islands and try not to brake if i can also try and keep revs under 3000 when accelerating. apprently it is better to have air con on that to put the window down as having a window open increases fuel consumption by 5% but my A/c needs regassing so its pretty useless
 
I love this quote

"Ive had to resort to putting the car into neutral and coasting down hills to improve the fuel consumption on my 1.4, I love the car to pieces but HATE the MPG."

Did you know, that in cars nowadays you actually use more fuel by coasting than if you did if you had it in gear?

I'll explain..


If you're rolling down a hill in 4th Gear, with feet of all pedals, your ECU tells your injectors to stop injecting fuel, full stop.

As soon as you put that clutch in, the revs drop and the car goes back to idle, in which the car has to inject fuel back into the engine to keep the car ticking over.

So, at no point are you using no fuel. However, I am using no fuel and I'm in 4th gear cruising down a hill.

I'm sure Tom will disagree with me somewhere, but it's true :)

64.4MPG.

Thank you very much.
 
Yes I will as at no point does it ever stop fueling.

It will open the idle valve to let air in and add fuel.

If it stopped fueling the engine note would change as it would effectively stall.

On a suitable PRIVATE hilly bit of road turn the key back one notch and see the difference.
 
he must be , i agree with tom on this one. i have spoken about this previously with other mechanics and they agree along the lines of tom :)

although it pains me to agree...lol

ade
 
right okay so better to leave in gear or out of gear to roll down 'private' hills?
 
I get a noticably higher mpg when i put it in neutral on hills. I get apporx 10 miles more to every tenner I put in. not bad on a 1'4sx I tell thee.
 
POOR MPG

Coincidence! I checked my mpg earlier my 1.4 is
doing about 41.5mph

ronako
 
I just checked mine, lol my HGT is doing 28mpg, hmmmm best stop prodding the pedal to hear that gorgous noise :), wish the HGT had the 1.8 economy.

Ash.P
 
31.75mpg for last top up.

Kinda figured it was bad because I've really been blatting around everywhere past week.

in18.jpg

Current Mileage: 124,000 miles
 
My 1.4 is very good on fuel...had a weekend up scotland last year 1150 miles round trip and it used 2 and half tanks!!! not sure what it works out on mpg

Spencercopy.jpg
 

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