Citroen C4 2011 Model

[GZ100]

Hi. I have just recently purchased a c4 2011 model.

my previous c4 which was a 2008 model could do 1200km to the full of the tank roughly 50/55mpg,

whereas mt newest model can only do 940km to full of the tank roughly 43mpg.

I do a daily round trip commute of 200km daily which is all mototway driiving so the speedometer doesn't drop below 120km/hr which makes it more bizzare.

any advise on what the problem could be?

The car is second hand and has had only one previous owner.

The car currently has 175km on the clock.

any help or advise would be greatly appreciated. :)

[paul.h]

A bit more info is needed. Is it petrol or diesel and engine size and bhp and whether auto or manual gearbox and no. of gears. Also is the fuel tank the same size.

 

We went from a 2008 to 2011 C4, both 1.6 hdi 110 bhp 6 speed manual gearbox. From memory the 2008 averaged about 48 mpg and the 2011 about 53 mpg over a long period. We would not have done 120 km/hr (75 mph) though since in the UK that is above all the speed limits.

[GZ100]

Hi Paul.h

it is a manual diesel car

owners manual says it should do 55mpg and it has a 60 litre tank.

 

I am presuming this is some kind of a fault in the engine? or oil being used?

[Johndouglas]

Have you checked the tyre pressures?   Do the wheels spin freely when jacked up without the brake pads dragging?

[GZ100]

yeah I have checked break pads and the tyres are spinning freely.

[paul.h]

So what size engine and bhp is it and how many gears ?

 

The fuel economy in the handbook will be the official test figures but the one you are quoting will likely be the combined cycle and not constant high speed driving.

 

If you are doing over 120 km/h (75 mph) all the time, not many cars will give good fuel economy, have you thought of slowing down ? Also maybe on your previous car the speedo was reading high so you were doing a lower speed than you thought. This could also give a higher distance travelled than actual. As the weather warms up fuel economy should also improve.

 

Just noticed you have put the car has done 175 km, if correct then as it wears in the economy will improve. If you meant 175000 km, then maybe the engine has worn out or the exhaust dpf has been removed or is blocked or other mods have been made that affect the fuel use. You could also check if the air filter is clean.

[GZ100]

Guys

Thanks for all the feedback but I have got to the bottom of the problem

Basically the fuel light is faulty..

I have done 220km with the fuel light on.

so for a 60 litre tank I am getting 1120km which works out at 50mpg :)