Apologies - yet another MPG query - Page 3

FrenchMike · 26th January 2016, 16:55

Use the OBD in 4.0 ,you'll see your momentary fuel consumption...edifying !

http://www.the75andztclub.co.uk/foru...rd+diagnostics

Mike

andymc · 26th January 2016, 17:14

Hmm, I think I'm quite good at the old economy driving - lifting off early rather than braking, not indulging in 0-60 derbies etc, and as I say the majority of my mileage is rural. I generally do between 80-90 miles a week, and only about 10 or 11 miles of that goes through any sort of urban (30mph) zone. Most of the time it's just me in the car, too. Any additional longer trips with the other half on board are of necessity on motorways/dual carriageways.

Ultimately I can't get away from the fact that my driving style is the same for both cars, yet the difference in fuel consumption is so markedly different.

I'll give the OBD a go - is that up to 19 first and then 4, or just up to 4 and leave it? EDIT I see it's the former, thanks.

Spenrex · 26th January 2016, 17:17

19 and then 4

andymc · 29th January 2016, 13:19

Ok, I'm fairly sure I've solved this.

I had decided I was going to stop with the pussyfooting around trying to eke out the fuel, and instead to drive the car to its abilities for a bit to see what more normal driving would do to the fuel economy. Only ... it felt a bit like driving through treacle. In fact, at one stage I found myself dropping into fourth to get past a van that was doing slightly less than 50mph. Today, it was even more sluggish again - then after a short while the ABS warning light came on. Back to ultra-cautious driving mode!

Got back home and the front O/S wheel was warm to the touch, even though this run had been less than five miles. With the car jacked up and in neutral, it was an effort to spin the front wheel. Trundled round to the local garage for a more expert opinion and came away with the recommendation that the front calipers need to be replaced, along with new discs & pads. Obviously my efforts at light-footed driving in recent days had actually masked the lack of responsiveness! The car had only had new front pads back in early October or thereabouts but the caliper sticking has started an uneven wear pattern, so better to get it all done again.

Hopefully this will be the root of the excessive fuel consumption - looking forward to getting 75mpg soon ...

GordyB · 29th January 2016, 15:48

Another data point for people searching for MPG questions .

My 2001 CDT Connie SE has had EGR bypass, recent fuel pumps (both) and a forte injector clean. Running temps range from 84-86 and I've just done a brim to brim check to see how accurate my IPK is. The weather meant my FBH was used everyday including 15 minutes each morning before starting the car. IPK said 46.3 calculated mpg was 45.9 for a mixture of town and A roads no motorway, school runs plus longer journeys over a week of driving 500 miles +

Happy with that, only about 5 mpg less than my A3 1.9tdi which was a much smaller car 8 years younger and no FBH.

Gordon

mystabe · 29th January 2016, 15:57

I have fun with my car - CDTi auto 160map - and I get an average of about 36mpg. If I sit on a motorway at about the speed limit I get 46 which is fine. I need to fit a new MAF though but as diesel is the same price as petrol at the moment whatever, I've never owned a decent 2+ litre petrol car with similar torque that could match those figures so I'm happy

COLVERT · 29th January 2016, 17:03

Quote:

Originally Posted by andymc

Ok, I'm fairly sure I've solved this.

I had decided I was going to stop with the pussyfooting around trying to eke out the fuel, and instead to drive the car to its abilities for a bit to see what more normal driving would do to the fuel economy. Only ... it felt a bit like driving through treacle. In fact, at one stage I found myself dropping into fourth to get past a van that was doing slightly less than 50mph. Today, it was even more sluggish again - then after a short while the ABS warning light came on. Back to ultra-cautious driving mode!

Got back home and the front O/S wheel was warm to the touch, even though this run had been less than five miles. With the car jacked up and in neutral, it was an effort to spin the front wheel. Trundled round to the local garage for a more expert opinion and came away with the recommendation that the front calipers need to be replaced, along with new discs & pads. Obviously my efforts at light-footed driving in recent days had actually masked the lack of responsiveness! The car had only had new front pads back in early October or thereabouts but the caliper sticking has started an uneven wear pattern, so better to get it all done again.

Hopefully this will be the root of the excessive fuel consumption - looking forward to getting 75mpg soon ...

75 mpg----Wow.

I tried for that but all I got was the figure in the pic. below. ( At 40 mph. )

FrenchMike · 29th January 2016, 17:34

Quote:

Originally Posted by COLVERT

75 mpg----Wow.

I tried for that but all I got was the figure in the pic. below. ( At 40 mph. )

Whaou John ...4.4 litres/100 km ....give me the recipe please

andymc · 29th January 2016, 17:37

Eh, I may not have been completely serious about the 75 mpg there ...

lipsee · 24th February 2016, 11:39

Hi,,Last sunday I did a trip to London ,,going down I could not hang around so had to "boot it" ( about 80) coming back stuck the CC on and cruised at 60..I brimmed the tank at Sleaford and again in London and it worked out at 41mpg,returning and brimmed again in Sleaford it worked out at just 50mpg..Not bad for an auto !!! Just rereading this post again you would think it took ages to get back to Sleaford,,not really,I never timed it but driving ecomomicly does not cost you that much more time,at least when I drive at night,,regards

26th January 2016, 17:14	#22
andymc Posted a thing or two Wedgewood Connie SE / Black Club SE Join Date: Jan 2014 Location: Ballymoney Posts: 1,459 Thanks: 542 Thanked 583 Times in 365 Posts	Hmm, I think I'm quite good at the old economy driving - lifting off early rather than braking, not indulging in 0-60 derbies etc, and as I say the majority of my mileage is rural. I generally do between 80-90 miles a week, and only about 10 or 11 miles of that goes through any sort of urban (30mph) zone. Most of the time it's just me in the car, too. Any additional longer trips with the other half on board are of necessity on motorways/dual carriageways. Ultimately I can't get away from the fact that my driving style is the same for both cars, yet the difference in fuel consumption is so markedly different. I'll give the OBD a go - is that up to 19 first and then 4, or just up to 4 and leave it? EDIT I see it's the former, thanks. __________________ My blood brother is an immigrant A beautiful immigrant My blood brother's Freddie Mercury A Nigerian mother of three Last edited by andymc; 26th January 2016 at 17:17..

26th January 2016, 17:17	#23
Spenrex Avid contributor MG ZT-T Join Date: Sep 2015 Location: Holmfirth Posts: 236 Thanks: 51 Thanked 39 Times in 30 Posts	19 and then 4 __________________ [SIGPIC][/SIGPIC]

29th January 2016, 13:19	#24
andymc Posted a thing or two Wedgewood Connie SE / Black Club SE Join Date: Jan 2014 Location: Ballymoney Posts: 1,459 Thanks: 542 Thanked 583 Times in 365 Posts	Ok, I'm fairly sure I've solved this. I had decided I was going to stop with the pussyfooting around trying to eke out the fuel, and instead to drive the car to its abilities for a bit to see what more normal driving would do to the fuel economy. Only ... it felt a bit like driving through treacle. In fact, at one stage I found myself dropping into fourth to get past a van that was doing slightly less than 50mph. Today, it was even more sluggish again - then after a short while the ABS warning light came on. Back to ultra-cautious driving mode! Got back home and the front O/S wheel was warm to the touch, even though this run had been less than five miles. With the car jacked up and in neutral, it was an effort to spin the front wheel. Trundled round to the local garage for a more expert opinion and came away with the recommendation that the front calipers need to be replaced, along with new discs & pads. Obviously my efforts at light-footed driving in recent days had actually masked the lack of responsiveness! The car had only had new front pads back in early October or thereabouts but the caliper sticking has started an uneven wear pattern, so better to get it all done again. Hopefully this will be the root of the excessive fuel consumption - looking forward to getting 75mpg soon ... __________________ My blood brother is an immigrant A beautiful immigrant My blood brother's Freddie Mercury A Nigerian mother of three

29th January 2016, 15:48	#25
GordyB Gets stuck in ZT, ZT-T Join Date: Aug 2015 Location: Brigg Posts: 932 Thanks: 505 Thanked 313 Times in 160 Posts	Another data point for people searching for MPG questions . My 2001 CDT Connie SE has had EGR bypass, recent fuel pumps (both) and a forte injector clean. Running temps range from 84-86 and I've just done a brim to brim check to see how accurate my IPK is. The weather meant my FBH was used everyday including 15 minutes each morning before starting the car. IPK said 46.3 calculated mpg was 45.9 for a mixture of town and A roads no motorway, school runs plus longer journeys over a week of driving 500 miles + Happy with that, only about 5 mpg less than my A3 1.9tdi which was a much smaller car 8 years younger and no FBH. Gordon __________________ Gordon https://www.the75andztclub.co.uk/for...73f7538906.jpg 2001 Connie SE Raven Black, CDT - scrapped 2004 ZT-T+ XPG, 1.8T - sold 2002 ZT+ Biomorphic Supertallic #2 of 10, CDT - sold 2004 ZT-T+ Goodwood Aquamarine, CDT - sold 2004 BMW 320d

29th January 2016, 17:37	#29
andymc Posted a thing or two Wedgewood Connie SE / Black Club SE Join Date: Jan 2014 Location: Ballymoney Posts: 1,459 Thanks: 542 Thanked 583 Times in 365 Posts	Eh, I may not have been completely serious about the 75 mpg there ... __________________ My blood brother is an immigrant A beautiful immigrant My blood brother's Freddie Mercury A Nigerian mother of three

26th January 2016, 16:55	#21
FrenchMike This is my second home Rover 75 Saloon Join Date: Aug 2007 Location: Avignon Posts: 4,466 Thanks: 94 Thanked 661 Times in 554 Posts	Use the OBD in 4.0 ,you'll see your momentary fuel consumption...edifying ! http://www.the75andztclub.co.uk/foru...rd+diagnostics Mike

29th January 2016, 15:57	#26
mystabe Posted a thing or two Mazda 6 Join Date: Dec 2013 Location: Wigan Posts: 1,384 Thanks: 266 Thanked 398 Times in 287 Posts	I have fun with my car - CDTi auto 160map - and I get an average of about 36mpg. If I sit on a motorway at about the speed limit I get 46 which is fine. I need to fit a new MAF though but as diesel is the same price as petrol at the moment whatever, I've never owned a decent 2+ litre petrol car with similar torque that could match those figures so I'm happy

24th February 2016, 11:39	#30
lipsee Regular poster Touer,diesel auto,, Join Date: Jan 2016 Location: Lincs Posts: 84 Thanks: 8 Thanked 7 Times in 7 Posts	Hi,,Last sunday I did a trip to London ,,going down I could not hang around so had to "boot it" ( about 80) coming back stuck the CC on and cruised at 60..I brimmed the tank at Sleaford and again in London and it worked out at 41mpg,returning and brimmed again in Sleaford it worked out at just 50mpg..Not bad for an auto !!! Just rereading this post again you would think it took ages to get back to Sleaford,,not really,I never timed it but driving ecomomicly does not cost you that much more time,at least when I drive at night,,regards Last edited by lipsee; 24th February 2016 at 11:43..