2.5 v6 auto estate fuel economy - Page 2

grout20 · 29th April 2018, 11:21

Quote:

Originally Posted by Dorchester2

...
IMHO this fine car is better on large roads with not too many corners or motor roads at high speed than in town or small roads with corners, uphill & downhill, and better on long journeys than on short ones.
.

I brimmed my V6 full of petrol and took a leisurely (most pleasant) 120 mile journey on fairly clear motorways last week, after resetting the MPG display on the car.

Cruise control a lot of the time, always staying around 65 / 70 mph.

The display showed 40.2 mpg when I arrived back at home. I find that hard to believe but haven't yet re-brimmed it to do any calculation.

I try not to use it for short / shopping journeys around town ... that's what the old Corsa is for!

Roverbarmy's idea to pop a few gallons in now and again and forget it is spot on!

Happy Roving, folks...

John

Brunty · 29th April 2018, 11:38

I use the 1.8L manual for short journeys, work & back etc. Yesterday longish run to Shrewsbury, took the 2 litre auto. Never even think about the petrol, didn't buy Rovers for that.

kaiser · 29th April 2018, 11:45

My v6 estate auto the best I have had is about 10km/liter.

My Jaguar auto 2.0 V6 does 12.5km/liter
My MGF does 15 to 16km/liter even doing 100mph!

danbax · 29th April 2018, 13:13

Quote:

Originally Posted by grout20

I brimmed my V6 full of petrol and took a leisurely (most pleasant) 120 mile journey on fairly clear motorways last week, after resetting the MPG display on the car.

Cruise control a lot of the time, always staying around 65 / 70 mph.

The display showed 40.2 mpg when I arrived back at home. I find that hard to believe but haven't yet re-brimmed it to do any calculation.

I try not to use it for short / shopping journeys around town ... that's what the old Corsa is for!

Roverbarmy's idea to pop a few gallons in now and again and forget it is spot on!

Happy Roving, folks...

John

Maybe it is around about correct as my journey of 88miles and around 1/4 ~ from 1/2 tank~ with around 70 stop starts over period of 6 hours reading was 24mpg driving like I was captain slow increasing before gradients and 0 throttle down the other side etc
Anyway had a moment of as they say road rage with some heavy throttle for around 3 to 4 miles
Dropped as low as 21mpg and slowly increased back to 23.7mpg the rage subsided lol

However after the rescue mission this morning that dropped dramatically thing is what's the lowest mpg I can really expect if drive it like i stole it
On a plus note it's a good reason to stop smoking so I can fuels this superb car

Also as for checking vis I'd have to research that one
Anything else to look for driving these hard or to keep an eye on ??
fan only kicks in at 105degrees as well

The car is in mint condition for 14 ur old only issue is sunroof no working cruise control either and can't see recent belts change but supposedly was previous members car hopefully they changed them need to check them if I knew how ...

Excuse grammar I never went to scholl and its difficult to type on a mobile

Dorchester2 · 30th April 2018, 13:26

Quote:

Originally Posted by grout20

I brimmed my V6 full of petrol and took a leisurely (most pleasant) 120 mile journey on fairly clear motorways last week, after resetting the MPG display on the car.

Cruise control a lot of the time, always staying around 65 / 70 mph.

The display showed 40.2 mpg when I arrived back at home. I find that hard to believe but haven't yet re-brimmed it to do any calculation.

Quote:

Originally Posted by danbax

Maybe it is around about correct as my journey of 88miles and around 1/4 ~ from 1/2 tank~ with around 70 stop starts over period of 6 hours reading was 24mpg driving like I was captain slow increasing before gradients and 0 throttle down the other side etc
Anyway had a moment of as they say road rage with some heavy throttle for around 3 to 4 miles
Dropped as low as 21mpg and slowly increased back to 23.7mpg the rage subsided lol

Quote:

Originally Posted by stocktake

The handbook says you will only get 16mpg around town on a 2.5v6 auto. End of story really.

I know that towns or motor roads, stops & starts or long journeys, and all the like, should make a big difference, but how on earth could we notice so large gaps between max & min mpg?

I'm not a newbie in driving (I began 45 years ago...), I tried to manage very good mpg with my Rover 25 1.4 and I succeeded knowing lots of ropes to get a thrifty consumption, but I dunno how to do the same with my 'recent' V6 2.5!

The engine is top-notch & in fine order, all parts were verified & all that wasn't perfect was changed, all services done, no error codes, brand new or little used premium tyres even a bit over inflated, drive careful & responsible, in other words the car is a real joy to drive, smooth, efficient, responsive, powerful and so on, revs generally between 1.5k & 2.5k, very seldom 3 or 4k only when - rarely - kicking down only while overtaking, but no actual & sensible mpg improvement.

Either in eco mode or sport mode, either on country roads (60mls great max) or on motor roads (75mls great max), either with A/C or without, the average mpg stubbornly remains stuck around 24mpg with full ethanol, that is the equivalent of approx. 30mpg for those using 95 octane grade petrol (I did 30mpg in the very beginning when using the standard gas).
Naturally there are some variations, but that doesn't modify at all the average mpg which remains rather steady.

Weird, isn't it?

rrobson · 30th April 2018, 18:39

Basically if your looking for economy, don't buy a v6, especially when combined with these auto gearboxes!!!

Dorchester2 · 30th April 2018, 20:49

Quote:

Originally Posted by rrobson

Basically if your looking for economy, don't buy a v6, especially when combined with these auto gearboxes!!!

I'm not looking for economy and I've not bought a V6 to run cheap!
I'm not that mean & tight.
I wasn't well understood.

Have another close look at what I've told that is based upon two points:

1. I don't understand why there are so huge a gap in mpg between some KV6 auto and others.

2. The aim I'm tending to is a kind of challenge: improving mpg, given what I've got in hands, a not so thrifty engine & gearbox admittedly.
If some guys are able to make 40mpg or about, why not me?
And if I can't, I may hope to get a bit closer than I'm presently...

Is it a bit clearer now, isn't it?

rrobson · 30th April 2018, 20:58

An auto tourer v6 won't ever manage 40mpg because of the weight and you can't go slow enough to get the economy due to the gearbox. Torque converter doesn't lock until after 62mph so anything less is wasting Fuel due to spinning torque converter and anymore your wasting Fuel due to drag. The only way I think you'd manage 40mpg is if you sat at exactly 63mph for the entire tanks worth of fuel. No stops, no speed change etc.

I remember years ago someone managed to get 500 miles out of a tank on a v6 auto. This was a first and I dont think many have managed it since. That was an average of something like 38mpg.

Dorchester2 · 30th April 2018, 21:05

Quote:

Originally Posted by rrobson

An auto tourer v6 won't ever manage 40mpg because of the weight and you can't go slow enough to get the economy due to the gearbox. Torque converter doesn't lock until after 62mph so anything less is wasting Fuel due to spinning torque converter and anymore your wasting Fuel due to drag. The only way I think you'd manage 40mpg is if you sat at exactly 63mph for the entire tanks worth of fuel. No stops, no speed change etc.

I remember years ago someone managed to get 500 miles out of a tank on a v6 auto. This was a first and I dont think many have managed it since. That was an average of something like 38mpg.

I haven't a tourer but a saloon.
If you think I can make 38mpg I sign at once !
Thanks for the explanation about the torque converter : I didn't know that.

danbax · 3rd May 2018, 12:44

Interesting comments some seem a little negative however I'm pleasantly happy with this car and think I can manage to drive in an ego friendly manner to save mpg
However I'm really NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- off with the anti theft cloaking device when pulling off from a start/standstill every bstrd time I goto the boot it's locked and I have to go back to the cab and open it lil

29th April 2018, 11:45	#13
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	My v6 estate auto the best I have had is about 10km/liter. My Jaguar auto 2.0 V6 does 12.5km/liter My MGF does 15 to 16km/liter even doing 100mph! __________________ Worth his V8 in gold Last edited by kaiser; 7th May 2018 at 10:29..

30th April 2018, 18:39	#16
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: 2,643 Thanks: 17 Thanked 295 Times in 218 Posts	Basically if your looking for economy, don't buy a v6, especially when combined with these auto gearboxes!!! __________________ How to view a car - everything you need to help you inspect a used car VIS motor tester avalible to local members Injector removal tool and auto gearbox pressure tester now available

30th April 2018, 20:58	#18
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: 2,643 Thanks: 17 Thanked 295 Times in 218 Posts	An auto tourer v6 won't ever manage 40mpg because of the weight and you can't go slow enough to get the economy due to the gearbox. Torque converter doesn't lock until after 62mph so anything less is wasting Fuel due to spinning torque converter and anymore your wasting Fuel due to drag. The only way I think you'd manage 40mpg is if you sat at exactly 63mph for the entire tanks worth of fuel. No stops, no speed change etc. I remember years ago someone managed to get 500 miles out of a tank on a v6 auto. This was a first and I dont think many have managed it since. That was an average of something like 38mpg. __________________ How to view a car - everything you need to help you inspect a used car VIS motor tester avalible to local members Injector removal tool and auto gearbox pressure tester now available

29th April 2018, 11:38	#12
Brunty Loves to post Rover 75 Saloon Join Date: Mar 2017 Location: Newtown Posts: 415 Thanks: 273 Thanked 95 Times in 65 Posts	I use the 1.8L manual for short journeys, work & back etc. Yesterday longish run to Shrewsbury, took the 2 litre auto. Never even think about the petrol, didn't buy Rovers for that.

3rd May 2018, 12:44	#20
danbax Avid contributor rover 75 Join Date: Apr 2013 Location: newcastle Posts: 141 Thanks: 14 Thanked 2 Times in 2 Posts	Interesting comments some seem a little negative however I'm pleasantly happy with this car and think I can manage to drive in an ego friendly manner to save mpg However I'm really NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD-NAUGHTY WORD- off with the anti theft cloaking device when pulling off from a start/standstill every bstrd time I goto the boot it's locked and I have to go back to the cab and open it lil