Drove a Jaguar XF Diesel S and got 13mpg ???

[tim2100]

Welshbeef said:

daemon said:

culpano said:

Drove it on a 20 mins run, mixed twisty road, motorway and town driving.
Ok I did floor it a couple of times but 13mpg ????

Which is exactly why you cant take one run and assume its typical.

When i got my last 535d i got 9mpg on its first run.

Overall i was getting 34mpg on subsequent use.

IIRC when top gear had the pre lci 535d they thrashed it all day and even then they still got in the 20's where as other cars they test get single digits. So 9 mpg on the queens highway bloody good going. Plus our friend in autobhan got nearly 20mpg from 80miles of 155mph..

12 mpg. http://www.youtube.com/watch?v=QN4-KA0VGzs

[Lordglenmorangie]

oldcynic said:

Lordglenmorangie said:

A question for all you Golf tdi chaps, I bought a tdi 130 GT and when I first got it was averaging 54 to the gallon this has dropped to 38/40 I do a lot of short runs 5/10 miles this plus cold weather, is this the reason for the drop. Mind you not complaining, love the torque

Will it have an auxiliary heater to get the engine up to temperature quicker? This would also use diesel, and if you're constantly driving 5/10 miles from cold you're probably running the heater a fair proportion of the time in this weather.

Oh yes full on all the time, we are not that tough up North

[dcb]

Welshbeef said:

Plus our friend in autobhan got nearly 20mpg from 80miles of 155mph..

That old chestnut.

For those that find GCSE Physics a challenge, repeat
and learn: Speed isn't acceleration.

Or saying the same thing a different way, ever wondered
why the urban fuel consumption figures, where top speed
is about 30 mph, are, for every car, always a lot
less than the 56 mph number ?

In layman's terms, it's not the doing 155 mph that kills
fuel consumption, it is how fast you get there.

Treat the car with no mechanical sympathy, i.e. use the
brakes and accelerator as on / off switches and you
will get lousy numbers.

[Welshbeef]

From what the op autobhan poster said watch out for other road users ie lots of hard braking to slow for overtaking lorries then hard acceleration back up to max speed.


I'm honestly struggling with you here how you seriously think his 9mpg is genuine is beyond me. There is something wrong with it highly likely a fuel leak this is a diesel not a big petrol. And lots of hard braking and hard accelerating in an urban area will get you to mid twenties that's about it. Top gear even on a racing track all day didn't get close to 9mpg and that's lots of on-off accelerating and emergency stopping from vmax with countless full performance testing. Anyone doing any of that on the public highway deserves to go to a mental home as your going to kill someone

[daemon]

Welshbeef said:

From what the op autobhan poster said watch out for other road users ie lots of hard braking to slow for overtaking lorries then hard acceleration back up to max speed.


I'm honestly struggling with you here how you seriously think his 9mpg is genuine is beyond me. There is something wrong with it highly likely a fuel leak this is a diesel not a big petrol. And lots of hard braking and hard accelerating in an urban area will get you to mid twenties that's about it. Top gear even on a racing track all day didn't get close to 9mpg and that's lots of on-off accelerating and emergency stopping from vmax with countless full performance testing. Anyone doing any of that on the public highway deserves to go to a mental home as your going to kill someone

My car. I was in it not you. First run in my non LCI 535d got 9mpg across the city.

I was using it to demonstrate the fact that big diesels can produce ultra low trip computer readings in certain circumstances.

Now are you really going to obsess on about this any longer?

[V88Dicky]

MrMoonyMan said:

V88Dicky said:

I'd imagine a nice XF SV8 would be more economical than those figures.

Ha ha! If only. The V8 is hilariously bad on fuel.

Our one used to sit around 9mpg on test runs going up to 20 when being used for commuting... went well though.

Oh I dont know. The missus has the XF SV8s predecessor, an S-type V8S, and its averaging over 25 mpg over the whole week, commuting, shopping runs, family visits and all.
Not bad, considering her old Passat 2.0 petrol used to average 29 mpg under the same conditions!

[Welshbeef]

daemon said:

Welshbeef said:

From what the op autobhan poster said watch out for other road users ie lots of hard braking to slow for overtaking lorries then hard acceleration back up to max speed.


I'm honestly struggling with you here how you seriously think his 9mpg is genuine is beyond me. There is something wrong with it highly likely a fuel leak this is a diesel not a big petrol. And lots of hard braking and hard accelerating in an urban area will get you to mid twenties that's about it. Top gear even on a racing track all day didn't get close to 9mpg and that's lots of on-off accelerating and emergency stopping from vmax with countless full performance testing. Anyone doing any of that on the public highway deserves to go to a mental home as your going to kill someone

My car. I was in it not you. First run in my non LCI 535d got 9mpg across the city.

I was using it to demonstrate the fact that big diesels can produce ultra low trip computer readings in certain circumstances.




I tell you what I can get 0 mpg ... Without trying so what do you think about that - stationary and if I was retarded enough I could let the tank run dry in fact I could do that in a polo bluemotion or a corvette c7 what it does represent it nothing whatso ever.??? Conversly when on commuting I get 40-42 mpg and when on long runs I get into the low to mid 50's.

Where is the OP to respond to my questions so we can understand what is wrong with it
Now are you really going to obsess on about this any longer?