help my mpg

[steve_earwig]

Even a bicycle? I not getting far short of that from the yoyo and that mostly does shopping runs & wife to and from work 4km away, and you know how fuel-efficient and aerodynamic that is. Plus even in the depths of winter it reaches its operating temperature on these short runs, unlike the diesel Pug which has scarcely warmed up by the time I get home again, doing god knows what harm to the engine...

[dave406]

see my water and oil is up to temp half way to work

[Puggy2]

Ive had my 2000 2.0 HDi Estate for just over 3 years (Had 405 1.9TD befiore) soon after I bought it I fitted a box that goes between the harness for the fuel rail this made a massive difference a lot more torque from as low as 1800 rpm & I get a minimum of 45 and as good as 65mpg. The funny thing is I paid £80 for it the same company now charge £250 for the same box so would take a while to pay for itself. Iain

[dave406]

over the last 100 miles i averaged 21.mpg

[annie10]

im getting 40 mpg from my hdi 110 estate mostly around town. only had it a few weeks and haven't been on any runs yet but.

[dave406]

I really cannt take. It any ymore my 1.8 ventral did.better around town

[rwb]

over the last 100 miles i averaged 21.mpg

What?

How?

[dave406]

I have no idea that's just normal around town I'm paying more for.fuel Cos it's diesel but getting less then a petrol 1.8 vectra. I'm starting to need a different car

[Bailes1992]

Have you done anything I mentioned previously?

Personally I would ensure you have 4 good tyres, preferably matched across each axle and correctly balenced.
Ensure the geometry is cock on! Even if it's out slightly it can massively increase fuel consumption and reduce tyre life.
Get the gearbox oil changed, something often overlooked. This is a must ecspcially with an auto!
Engine oil should be replaced every 6,000miles/6months. Look to change to 5w40/5w30 fully synthetic.
Look into disabling the EGR Valve and clean out the inlet manifold and ports.
Decat would help improve economy also! You could probably get the standard CAT "gutted" FOC by an exhaust fabricator due to the value of the cat itself!
Look to use better quality diesels. Generally avoid supermarket fuel and maybe try some premium diesel like BP Ultimate!
Get a decent injector cleaner through the system. BG244 is a cracking cleaner! If you want something more concentrated the liquimoly diesel purge is great stuff but needs to be used neat. Have a google!
After all this, look to get an economy/mild stage one remap. Obviously you don't want to stress the auto box too much!

[GingerMagic]

over the last 100 miles i averaged 21.mpg

That is pants....
Even Doggy and I with our ' enhanced ' 2.2Hdis get 40mpg round town.

I would start to suspect a fuel leak and binding brakes with that low mpg.....

Bailes advice is pretty good - most of which are not that expensive to do.

[dave406]

Balies 4 new tyres at once all aligned I. Do think I might have a warped.disk gear oil was changed 5k ago so was the oil

[dave406]

Any tips.on.the.clearing and where to look for.fuel leak as nothing on the ground

[trufflehunt]

Is someone siphoning your diesel..?

[dave406]

Nope the range doesn't change.unless a cold morning. Plus cctv is clear

[dirtydirtydiesel]

over the last 100 miles i averaged 21.mpg

dave406,
Are you working this out by litres used / triping the millage or are you going on the fuel computer, there notoriously inacurate .
I get about 35-38 mpg if just driven round town, but as others have said this is the wrong car for that.
I average 45mpg in the winter months mixed driving & up to 51mpg in the summer months .
I'm going to be trying a EGR delete & air doser delete coupled to a re-map soon so I'll post up my findings