Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club General Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 10th June 2021, 21:09   #1
MissMoppet
Gets stuck in
 
MissMoppet's Avatar
 
R 75 Tourer diesel, V6 Conny

Join Date: Mar 2013
Location: Taunton
Posts: 689
Thanks: 178
Thanked 263 Times in 144 Posts
Default How to get 49.5 mpg

I've just done a 320 mile motorway run having installed the egr bypass, BMW replacement PCV AND Mr Muscle oven cleaned the manifold to achieve (IPK) 49.5mpg, 4 mpg better than I've ever obtained in 6 year's ownership. And some of the distance covered was legal speedwise.
__________________
Rover 75 Tourer CDTi 2004 remapped 160 auto, R75 V6 2.5L auto Connoisseur 2003
MissMoppet is offline   Reply With Quote
Old 10th June 2021, 21:14   #2
stevestrat
This is my second home
 
ZT260 #243

Join Date: May 2010
Location: Prestonpans
Posts: 19,500
Thanks: 453
Thanked 3,819 Times in 2,827 Posts
Default

Can I just put a slight dampener on it, the IPK fuel reading is always optimistic. Only reliable way to get a fuel consumption figure is doing a brim to brim mileage calculation.
__________________
Steve


T4 Location Map
stevestrat is offline   Reply With Quote
The Following User Says Thank You to stevestrat For This Useful Post:
Old 10th June 2021, 21:55   #3
bl52krz
This is my second home
 
bl52krz's Avatar
 
Rover 75 cdt club + Rover 2.5 KV6 Conni SE

Join Date: May 2008
Location: Birmingham
Posts: 10,082
Thanks: 5,603
Thanked 1,941 Times in 1,505 Posts
Default

Hi Dave. Can I just say that your mpg figure is very dependant on many things, especially tyres. At the.moment there are four Avon Z5 tyres on my KV6. They are not very good for mpg. The rating given to them is lower than the Goodyear Efficientgrip Performance that are on my diesel. My diesel, when there are four people and a full boot aboard when we go to France/Germany, and cruise around 80mph, we get over 50 mpg, every time, not just a one off. Just driving the short distances to the shops and visiting friends /relatives, I get around 44/46 mpg. The figures for touring on the continent are over anything between 1,000- 2200 miles so a good pointer what can be achieved using your left foot lightly.
__________________
Great Barr, Birmingham.
bl52krz is offline   Reply With Quote
Old 11th June 2021, 07:02   #4
grout20
Gets stuck in
 
grout20's Avatar
 
Rover 75 Connie SE 2.5 V6 Auto

Join Date: Aug 2015
Location: Stevenage
Posts: 538
Thanks: 531
Thanked 213 Times in 160 Posts
Default

Quote:
Originally Posted by stevestrat View Post
Can I just put a slight dampener on it, the IPK fuel reading is always optimistic. Only reliable way to get a fuel consumption figure is doing a brim to brim mileage calculation.
Too true.
I only use my 2.5 V6 Auto for longer journeys, rarely "around town" and IPK currently shows 39.2mpg since I last reset it 700 miles ago.
Now where's that pinch of salt...!?
It's a low mileage hobby car so mpg not a major concern and I use BP Ultimate.
Never raced or rallied that's for sure!
Regards
John
__________________
.

My 2.5 V6 Connoisseur SE Auto 75 is the
• 20,516th 75 to be made out of 112,381
• 787th 2.5 V6 Connoisseur SE to be made out of 3,671
• 1,248th Wedgwood Blue Metallic (code: JBH) to be made out of 7,515 code JBH 75's
grout20 is offline   Reply With Quote
Old 11th June 2021, 15:14   #5
Ray L
Avid contributor
 
rover 75 saloon

Join Date: Jul 2010
Location: Worcester
Posts: 148
Thanks: 12
Thanked 49 Times in 27 Posts
Default View first unread

Quote:
Originally Posted by stevestrat View Post
Can I just put a slight dampener on it, the IPK fuel reading is always optimistic. Only reliable way to get a fuel consumption figure is doing a brim to brim mileage calculation.
Steve can I disagree?

A very good and accurate alternative is to add up the gallons of fuel bought in a 12 month and divide it into the mileage driven.
Ray L is offline   Reply With Quote
Old 11th June 2021, 15:20   #6
stevestrat
This is my second home
 
ZT260 #243

Join Date: May 2010
Location: Prestonpans
Posts: 19,500
Thanks: 453
Thanked 3,819 Times in 2,827 Posts
Default

I wouldn't have the patience to wait 12 months to find out average fuel consumption.
__________________
Steve


T4 Location Map
stevestrat is offline   Reply With Quote
The Following User Says Thank You to stevestrat For This Useful Post:
Old 11th June 2021, 15:48   #7
Ray L
Avid contributor
 
rover 75 saloon

Join Date: Jul 2010
Location: Worcester
Posts: 148
Thanks: 12
Thanked 49 Times in 27 Posts
Default

Quote:
Originally Posted by stevestrat View Post
I wouldn't have the patience to wait 12 months to find out average fuel consumption.
Steve


You don't have to wait necessarily. I keep a record of fuel purchased, I can then refer back anytime to see my current mpg.
Ray L is offline   Reply With Quote
Old 11th June 2021, 16:30   #8
stevestrat
This is my second home
 
ZT260 #243

Join Date: May 2010
Location: Prestonpans
Posts: 19,500
Thanks: 453
Thanked 3,819 Times in 2,827 Posts
Default

Dunno if I'm missing something but I cant see any difference between what you do and a brim to brim calculation, just the way you are doing it gives an ongoing average . . . . with a 260 I don't think I'd want to know the ongoing average.
__________________
Steve


T4 Location Map
stevestrat is offline   Reply With Quote
Old 12th June 2021, 12:55   #9
Odd Job
Gets stuck in
 
Odd Job's Avatar
 
MG ZT 2.0 cdti

Join Date: Aug 2019
Location: Derby
Posts: 861
Thanks: 288
Thanked 189 Times in 147 Posts
Default

I manage on average 48mpg on my diesel, with a clean inlet manifold, EGR disabled, that's with mainly 60mph - ish running.
That's calculated by brimming the tank and mileage recorded and working it out rather than what it says on the IPK, but, I will say normally my IPK is only on average 1 mpg out which I was quite impressed with!
__________________
….And the latest thing to break is.....


### MG STANDS FOR "MY GREMLIN" !!!
Odd Job is offline   Reply With Quote
Old 12th June 2021, 17:35   #10
BillyRover
Loves to post
 
BillyRover's Avatar
 
Rover 75 Saloon CDTi Mk2

Join Date: Jan 2017
Location: St Helens
Posts: 455
Thanks: 173
Thanked 61 Times in 56 Posts
Default

The only thing I know about tyres is I had some decent part worns on last year and my mileage dropped to 44mpg. Replaced them early this year and back up to 48mpg. Of course, that's just on the computer but still - tyres obviously make a massive difference!
BillyRover is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 03:02.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Copyright © 2006-2020, The Rover 75 & MG ZT Owners Club Ltd