increasing MPG on a CDTi

fergy05 · 23rd May 2010, 22:04

guru's

what mods/changes can be done to increase MPG on a CDT?

obviously controlled driving is a must but what else?

ie air intake mod - does it help?

ta

fergy

JohnDotCom · 23rd May 2010, 22:08

May I ask if you have a Manual or Autobox?

rrobson · 23rd May 2010, 22:13

a good question would be what are you getting now? no point speaking hypothetically when we dont know where to start

fergy05 · 23rd May 2010, 22:19

its a manual matey

i havent actually brimmed the tank yet but my MPG comes across as good to me i dont have a problem im literaly trying to find out what helps and what hurts.

All these modifications are posted all over the forums but nought really on how much they will affect the MPG and as im penny pinching at the moment every little helps

bobthebuilder · 24th May 2010, 11:34

People say getting a knackered thermostat fixed should add a few mpg. As a related question, will a faulty theromosat still reduce mpg in the heat of summer?

T-Cut · 24th May 2010, 11:50

Check the running temperature using Diagnostic mode test 7. You really need it to run at 90-100C. Most diesels run at 88-90C with a good stat. If you find it's less than 80C, that's one reason for poor mpg. Replacing a defective thermostat is a very effective way of gaining 5mpg or so.

TC

23rd May 2010, 22:04	#1
fergy05 Regular poster 1999 rover 75 CDTi Join Date: May 2010 Location: rhondda Posts: 41 Thanks: 0 Thanked 0 Times in 0 Posts	increasing MPG on a CDTi guru's what mods/changes can be done to increase MPG on a CDT? obviously controlled driving is a must but what else? ie air intake mod - does it help? ta fergy __________________ 1999 75 Conny CDTi

23rd May 2010, 22:19	#4
fergy05 Regular poster 1999 rover 75 CDTi Join Date: May 2010 Location: rhondda Posts: 41 Thanks: 0 Thanked 0 Times in 0 Posts	its a manual matey i havent actually brimmed the tank yet but my MPG comes across as good to me i dont have a problem im literaly trying to find out what helps and what hurts. All these modifications are posted all over the forums but nought really on how much they will affect the MPG and as im penny pinching at the moment every little helps __________________ 1999 75 Conny CDTi

23rd May 2010, 22:08	#2
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	May I ask if you have a Manual or Autobox?

23rd May 2010, 22:13	#3
rrobson I really should get out more....... 75 tourer cdti, MG ZS 180, nissan terrano & 1.8t rover 25 Join Date: Feb 2010 Location: Pontefract Posts: 2,644 Thanks: 17 Thanked 295 Times in 218 Posts	a good question would be what are you getting now? no point speaking hypothetically when we dont know where to start

24th May 2010, 11:34	#5
bobthebuilder Gets stuck in Rover 75 CDTi Connoisseur SE Join Date: Jan 2010 Location: Gloucester Posts: 582 Thanks: 203 Thanked 70 Times in 55 Posts	People say getting a knackered thermostat fixed should add a few mpg. As a related question, will a faulty theromosat still reduce mpg in the heat of summer?

24th May 2010, 11:50	#6
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Check the running temperature using Diagnostic mode test 7. You really need it to run at 90-100C. Most diesels run at 88-90C with a good stat. If you find it's less than 80C, that's one reason for poor mpg. Replacing a defective thermostat is a very effective way of gaining 5mpg or so. TC