big loss of mpg on p38 diesel

sharplessb · Dec 18, 2010

up untill 2 weeks ago my range was always at about 24mpg around town and 28 on a run, then all of a sudden the car just starting using diesel for the fun of it, the highest ive got it over last couple of weeks is just over 18. if anyone has any ideas or suggestions i would be really grateful, i have recently changed oil, and all filters so theres no prob with old oil or clogged up filters.

cheers guys realy need help

wammers · Dec 18, 2010

sharplessb said:
up untill 2 weeks ago my range was always at about 24mpg around town and 28 on a run, then all of a sudden the car just starting using diesel for the fun of it, the highest ive got it over last couple of weeks is just over 18. if anyone has any ideas or suggestions i would be really grateful, i have recently changed oil, and all filters so theres no prob with old oil or clogged up filters.

cheers guys realy need help

If the mpg drop happend at or shortly after you changed filters. Try running it without the air filter for a couple of days and see what you get. There is not a lot of dust around in this weather to do any harm. It maybe that the new filter is more restrictive than the old one was. Other than that a intercooler flush may do some good.

sharplessb · Dec 18, 2010

the filters etc was done month or so before the mpg drop! i will get a turbo flush done though thanks

wammers · Dec 18, 2010

sharplessb said:
the filters etc was done month or so before the mpg drop! i will get a turbo flush done though thanks

Could still be air filter worth a couple of days without to see what you get.

LRO · Dec 18, 2010

Buy a V8....................

wammers · Dec 18, 2010

LRO said:
Buy a V8....................

He is complaining about getting 18 mpg. The only place you get that with a V8 is freewheeling down Shap.

p38on22s · Dec 18, 2010

LRO said:
Buy a V8....................

at least you will be warm when it catches fire

Grange Grover · Dec 18, 2010

I had a similar problem combined with poor performance, turned out to be the in tank lift pump.

Replacement pump sorted MPG & performance.

LRO · Dec 18, 2010

wammers said:
He is complaining about getting 18 mpg. The only place you get that with a V8 is freewheeling down Shap.

I get an easy 18mpg from a 4.6.
Pretty consistent 20mpg actually

LRO · Dec 18, 2010

p38on22s said:
at least you will be warm when it catches fire

But why?????????

The bmw diesel motor is a pile of **** and not suited to RR

Datatek · Dec 18, 2010

sharplessb said:
up untill 2 weeks ago my range was always at about 24mpg around town and 28 on a run, then all of a sudden the car just starting using diesel for the fun of it, the highest ive got it over last couple of weeks is just over 18. if anyone has any ideas or suggestions i would be really grateful, i have recently changed oil, and all filters so theres no prob with old oil or clogged up filters.

cheers guys realy need help

:welcome2: Look at the leak off pipes before you start changing expensive bits.

wammers · Dec 18, 2010

LRO said:
But why?????????

The bmw diesel motor is a pile of **** and not suited to RR

The one in mine suits it fine thanks. Comparativly cheap to run and a lot more reliable if looked after.

dean68uk · Dec 18, 2010

LRO said:
Buy a V8....................

Anyone else fed up of post hijacking here!!!!
The guy needs help NOT A V8 debate.
Help out or start your own thread!!!!!!

What about your MAP and MAF sensors?

Pikey · Dec 18, 2010

dean68uk said:
Anyone else fed up of post hijacking here!!!!
The guy needs help NOT A V8 debate.
Help out or start your own thread!!!!!!

What about your MAP and MAF sensors?

nope this is LZ if ya don't like having a thread hijacked then fook orf over to www.anallyretentivelandyowners.co.uk and post on there.

dean68uk · Dec 18, 2010

Just a thought do you have a hot start kit fitted?
How does the engine run when it starts?

dean68uk · Dec 18, 2010

redhand said:
nope this is LZ if ya don't like having a thread hijacked then fook orf over to www.anallyretentivelandyowners.co.uk and post on there.

Yeah cheers for that just what I expected, but it keeps your post count up though!

Pikey · Dec 18, 2010

dean68uk said:
Yeah cheers for that just what I expected, but it keeps your post count up though!

WHAT!are you trying to insinuate??

LRO · Dec 18, 2010

dean68uk said:
Anyone else fed up of post hijacking here!!!!
The guy needs help NOT A V8 debate.
Help out or start your own thread!!!!!!

What about your MAP and MAF sensors?

Feck off...
Were fed up of Mr self righteous knob heads like you...!

wammers · Dec 18, 2010

LRO said:
I get an easy 18mpg from a 4.6.
Pretty consistent 20mpg actually

Check the injectors. Four of them have stopped working.

Series71 · Dec 18, 2010

dummy spittin session coming up

big loss of mpg on p38 diesel

New Member

No longer with us, RIP

New Member

No longer with us, RIP

Banned

No longer with us, RIP

New Member

New Member

Banned

Banned

Well-Known Member

No longer with us, RIP

Active Member

Dummy Ejection Facilitator..

Active Member

Active Member

Dummy Ejection Facilitator..

Banned

No longer with us, RIP

Space man

Similar threads