increasing MPG on a CDTi - Page 2

BarryH · 24th May 2010, 17:18

Although I have had these cars for nearly seven years,this is my first diesel,which I bought last November. Initially I was disappointed with the mpg (38) but living in a rural area,and with no mods,I accepted it.However 3 months back,I went for a full service(and I mean full) and now on brim to brim check I am achieving 43 mpg which I am delighted with.
Barry

NikTheGeek · 24th May 2010, 20:05

Quote:

Originally Posted by Rolled1

,a de-cat will also help as it stops back pressure in the exhaust system

Are you allowed to do that? Will it not fail the MOT on something?

JohnDotCom · 24th May 2010, 20:41

On a diesel it will still pass the MOT fine due to the way they are tested and it gives you a few more bhp to.

NikTheGeek · 24th May 2010, 21:42

Excellent. Next question. How does one do it? Is it a DIY job or do you have to get a new exhaust fabricated? Is there a kit that anyone sells?

tnx

Nick

JohnDotCom · 24th May 2010, 21:46

Several specialist Exhaust centres will make or supply and fit a stainless Bypass pipe for you.
Prices etc vary wildly dependant on area and who doers it.

I am sure people will say who did theirs.

ceedy · 25th May 2010, 09:28

Bear in mind that you do stand the chance of a MOT failure..

if ...

1 ..your Car is after Oct 2003

and

2. the MOT man is on the ball.

As its not allowed to change any of the emission systems on cars are after that date.

You could still probably get away with a sports cat or even removing the innards for you cat so it looks the same .

I've had 2 companies refuse to decat my ZT CDTI for this same reason as its a late 53 plater .

Chris

fergy05 · 25th May 2010, 20:41

interesting reading thanks for the replies!

im going for a FULL service end of next month when bonus gets paid il have to brim to brim before and after

24th May 2010, 17:18	#11
BarryH Passed Away Rover 75 CDT Saloon Join Date: Nov 2009 Location: Nr.Torpoint. Cornwall Posts: 427 Thanks: 86 Thanked 21 Times in 19 Posts	mpg Although I have had these cars for nearly seven years,this is my first diesel,which I bought last November. Initially I was disappointed with the mpg (38) but living in a rural area,and with no mods,I accepted it.However 3 months back,I went for a full service(and I mean full) and now on brim to brim check I am achieving 43 mpg which I am delighted with. Barry

24th May 2010, 21:42	#14
NikTheGeek Gets stuck in 2002 Range Rover P38 Join Date: Dec 2008 Location: Wigan Posts: 593 Thanks: 0 Thanked 0 Times in 0 Posts	Excellent. Next question. How does one do it? Is it a DIY job or do you have to get a new exhaust fabricated? Is there a kit that anyone sells? tnx Nick __________________ ʞǝǝƃǝɥʇʞıu@ :ɹǝʇʇıʍʇ

25th May 2010, 09:28	#16
ceedy This is my second home All Trophy Blue ,ZT260#50 , ZT CDTI Auto, ZR105+ and 1.8T Firefrost spoiling the Set . Join Date: Nov 2006 Location: Nr Sherborne But in Somerset.. Posts: 6,075 Thanks: 916 Thanked 1,214 Times in 768 Posts	Bear in mind that you do stand the chance of a MOT failure.. if ... 1 ..your Car is after Oct 2003 and 2. the MOT man is on the ball. As its not allowed to change any of the emission systems on cars are after that date. You could still probably get away with a sports cat or even removing the innards for you cat so it looks the same . I've had 2 companies refuse to decat my ZT CDTI for this same reason as its a late 53 plater . Chris __________________ The Three Bloo's Wifey's Zr105, MY CDTI & 260 #50 and Number One sons 1.8T in Firefrost When I were a lad Zero to 142 in 10.25 secs at the Pod on my Blown Norton. 210 Kart Champ in 70's

25th May 2010, 20:41	#17
fergy05 Regular poster 1999 rover 75 CDTi Join Date: May 2010 Location: rhondda Posts: 41 Thanks: 0 Thanked 0 Times in 0 Posts	interesting reading thanks for the replies! im going for a FULL service end of next month when bonus gets paid il have to brim to brim before and after __________________ 1999 75 Conny CDTi

24th May 2010, 20:41	#13
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	On a diesel it will still pass the MOT fine due to the way they are tested and it gives you a few more bhp to.

24th May 2010, 21:46	#15
JohnDotCom * Rover 75 FaceLift Tourer CDTi 170BHP Auto ConnSE 2005 Model Starlight Silver Join Date: Nov 2006 Location: Abergele Posts: 28,735 Thanks: 0 Thanked 6 Times in 5 Posts	Several specialist Exhaust centres will make or supply and fit a stainless Bypass pipe for you. Prices etc vary wildly dependant on area and who doers it. I am sure people will say who did theirs.