S-Type 2.7D, abnormally high fuel consumption?

[Guijou]

Hi everyone!
 

I'm new to this forum, and just introduced myself on the dedicated section.

I'm from France and bought a beautiful S-Type 2.7D Excellence 5 days ago, and I'm so happy with it!
It have 140.000km (87.000 miles).

But, I think there is something strange with my fuel consumption...
 

I average 12,5 to 14 L/100km (22.5 to 20 uk mpg) in the city, trying to be as gentle as I can with the throttle pedal... and I have something like 8.5l/100km (33 UK mpg) on classic roads (not highways).

These measures seem to be very high to me, reading what other members fuel consumption is with the same 2.7 diesel motor (something like 30% lower!).
I know this engine can be thirsty when it's cold outside (but it's not cold these days) and just when the engine is cold, but this consumption remains the same after 15/20 minutes.

The car have a brand new timing belt, new tires, new electronic parking break motor, filters, and is running perfectly, with no strange noises.

What are your thoughts about it?

Thanks a lot, have a nice day! 🙂
 

Guillaume

[mrmike]

check your air filter, check your injectors. my 2.7 would only start on the 2nd try but returned 4.7 t0 5.1 l/100km on motorway cruising. I changed one injector which was very lean (600) now it starts first time but returns 5.1 t0 6.1 L/100km on motorway. I still have a rich injector 1200 on No 6 cyl so I will get another injector hopefully it will be a bit better. Around town and a bit mixed locally consumption is 8.0 to 8.5l/100Km

[Guijou]

11 minutes ago, mrmike said:

check your air filter, check your injectors. my 2.7 would only start on the 2nd try but returned 4.7 t0 5.1 l/100km on motorway cruising. I changed one injector which was very lean (600) now it starts first time but returns 5.1 t0 6.1 L/100km on motorway. I still have a rich injector 1200 on No 6 cyl so I will get another injector hopefully it will be a bit better. Around town and a bit mixed locally consumption is 8.0 to 8.5l/100Km

Wow this is incredibly low consumption! Maybe the lower I saw on any forum… Congrats!

My air filter is OK. Don’t know about my injectors… How to check them?

[mrmike]

When I fitted the S/H injector  I was getting around the low 9s/100km but it got better after a few weeks. I have the Icarsoft analyser. I can see the injectors and there is a reading (Offset) which refers to the time that the injectors open. Basically readings of 800 to 1100 are ok so they say. Now apart from cyl6 they are all about 1000

Motorway driving is usually in cruise at 120km/h, the legal limit here.

We are very happy with the fuel consumption, much better than our X3 in all respects.