(T) 500L - 1.6 multijet poor mpg

I'm interested in this also. Had ours 1.6 120 3 months now and averaging 38mpg (mainly stop start traffic I admit, but some good runs). But even on a run its doing only high 40's. Fiat are telling me this is normal. Its far worse than my automatic 2ltr diesel skoda superb and not much better than the 2ltr petrol mazda5 it replaced (to get better mpg).

It has recently been serviced and all tyre pressures are fine.

I’ve got a grande punto with the same engine I get 45 combined easily and 60 on a run. Mine does lots of short journeys and runs on Asda diesel, it gets serviced religiously and maintained with multiscan ecu, all emissions equipment is original and I don’t notice a difference in winter/summer. However if you drive it in a spirited manner all those figures disappear, and probably are similar to above

when you say maintained with multiscan ecu, what exactly do you mean? Just in terms of checking for codes etc? Or can it force dpf regens etc?

Certainly checking for codes etc, but more importantly oil degradation counter reset, on its annual oil change. Mine has the dpf, one hole restrictor on the egr, and all emissions systems as the factory intended. Very Occasionally the dpf clogged message comes up and I clear it with a run, never had to do a forced regen thankfully.

OK, thank you

Still poor mpg, definitely not a change from winter to summer fuels.

Did an oil change last month, all filters changed, oil change reset with Multiecuscan including service interval change, still the same poor 35.4mpg.

Selenia oil is so much better than this Castrol by the way if anyone's considering it. Castrol was on offer for £21. All filters changed with Mann, did notice the Mann filter is poorer on the air filter as the left side holes are not metal but plastic with larger gaps. Tyres checked and filled.

I'm starting to think the uconnect update did this, but then again that is just a radio and couldn't update the ecu in any way.

Today, for the first time the car is starting to lag on acceleration twice (first time seeing this as owned the car), the warranty did end a couple months back.

This is not like my very old Fiat Panda from the days...

I am getting around 45 mpg (mostly city traffic, sometimes country roads or highways). What I dislike is that the fuel consumption rises slowly. When the car was new, I got around 47 mpg.
I have the 17" wheels in summer, in winter (on 16" wheels) the gas mileage is slightly worse.

35 mpg would be a reason to sell it, after all this is a relatively small car. My previous car, a 2009 Citroen C4 Picasso HDI, got over 50 mpg.

That is similar to what I used to get.

I'm thinking its those Michelin All-Season tires causing this, the older continental tires felt so much smoother and had no virtually no tire noise.

Also, with that bloody new ULEZ in London which will cover my area in 2021, this Euro 5+ will require me to pay 12.50 every day I go outside my house far away from central London!