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Improbable MPG Figures - Post Yours

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#1 OFFLINE   Broadsword

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Posted 18 July 2017 - 01:44 PM

This was finally achieved with our 2003 V70 D5 manual today. It was done over a couple of months building up the average from around 50 mpg when we got the car off Drum. It's mostly mixed driving but the trick is to use cruise control all the time in addition to sensible driving, reading the roads ahead. Admittedly we are cruising across France at the moment and 61 mpg will be achieved soon. This is with the air con on and with three adults and luggage. Anyway I felt it was noteworthy enough to put here.

Put your best MPG figures here. How many have bettered the manufacturer specs?

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#2 OFFLINE   cpjitservices

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Posted 18 July 2017 - 01:52 PM

Pffffft I wish, My Mondeo, which apparently other people get high 40's I get mid 30's if I'm Lucky 

 

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That includes using Cruise Control.


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#3 OFFLINE   Mally

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Posted 18 July 2017 - 01:52 PM

I just keep filling them up.


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#4 OFFLINE   5speedracer

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Posted 18 July 2017 - 02:43 PM

My last 2 cars have lied by about 5mpg in their favour. Invalid unless arithmetic is involved.
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#5 OFFLINE   egg

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Posted 18 July 2017 - 02:56 PM

manual calc, best I've done in my 1.6 petrol duratec Fusion was 49.8mpg across 340 miles.

 

I've stopped recording it now, but across first 12.5k miles did 41.8mpg

 

BTW, real mpg on a modern Fiesta 100bhp (same as mine) ecoboost - 46.2 (source: https://www.honestjo...-ecoboost-100). Not that much in it, innit?


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#6 OFFLINE   sierraman

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Posted 18 July 2017 - 02:59 PM

58mpg in Mondeo Diesel Estate at 2am between Sheffield and East Midlands airport.
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#7 OFFLINE   hairnet

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Posted 18 July 2017 - 03:12 PM

Thrashed the bike to the stop in Germany so 100 moh flat for 30-40 miles was getting 55 mpg 

 

Sub 90 cruising as normal here and 63-65

 

Does 58-60 to from work 4 mile round trip

 

Have seen 73 from it Honda clain it can do 80

 

I'm not that bored and wouldn't sit at 48-50 to get that lol



#8 OFFLINE   castros_bro

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Posted 18 July 2017 - 03:20 PM

256 mpg Honda PC50
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#9 OFFLINE   Bianconeri

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Posted 18 July 2017 - 03:26 PM

Not improbable, in fact pretty normal - as posted in the "Dashboard at night" thread a while back.

 

http://autoshite.com...16#entry1224601


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#10 OFFLINE   lisbon_road

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Posted 18 July 2017 - 03:43 PM

No-one should believe fuel computers.  Typically 10% out I reckon.  

 

Running on petrol, I get 50 mpg+ out of my geriatric Astra.  On LPG rather less.  Have seen 55 mpg but need to drive like grandad for that.  


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#11 OFFLINE   rantingYoof

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Posted 18 July 2017 - 03:44 PM

A shame I got no photograph but Supernaut can verify that when I collected him from Birmingham airport a couple of months back I had achieved 43mpg on the journey there, which was 50mph average speed camera + M6 at normal motorway speeds.

 

I went back via the A45/M45 and the overall 80 mile roundtrip came in at 41mpg or thereabouts.

 

From a 2.0 20v five cylinder petrol car with turbo!

 

EDIT - yes, yes, 5-10% pinch-of-salt margin of course.

 

Larger unstressed engines can throw up pretty amazing results. However, SnrYoof's XF is probably the most remarkable. A 240hp 3.0d V6 married to an 8spd autobox which is at around 1600rpm at 70mph. His record is 58mpg on a combined 250 mile round trip mostly consisting of motorways and dual carriageways...pretty extraordinary for a two tonne car.


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#12 OFFLINE   flat4alfa

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Posted 18 July 2017 - 04:05 PM

Computers lie

 

 61 mpg will be achieved

 

Brim to brim you'll find you can knock 20% off that rewarding figure

 

I've a 2.4 5-pot Alfa Wagon from 2002 (therefore near enough 2003 D5 equiv.) but get 43 whatever I do


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#13 OFFLINE   Bianconeri

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Posted 18 July 2017 - 04:10 PM

No-one should believe fuel computers.  Typically 10% out I reckon.  
 
Running on petrol, I get 50 mpg+ out of my geriatric Astra.  On LPG rather less.  Have seen 55 mpg but need to drive like grandad for that.


The Kia one is pretty accurate I think. It shows 62mpg since I got it and in just over 5800 miles I've put in 420 litres of fuel. I'm not at all obsessive about mpg it just fits the bill of being very economical for a decently-sized car. That's just driving normally with no conscious effort to save fuel but it's always amusing when it drops into electric mode in traffic and I know I'm not using any petrol at all.

BTW, my erstwhile Volvo V70 sometimes used to show mpg like the one above. It would also show numbers like 3. Like most things on that car the fuel computer was junk.
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#14 OFFLINE   Lacquer Peel

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Posted 18 July 2017 - 06:17 PM

Iz350Kl.jpg

 

dsc_1053.1400x0.jpg

In something like this.


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#15 OFFLINE   HH-R

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Posted 18 July 2017 - 06:25 PM

I could get the Panda's average MPG to say some ridiculously high figures by gunning it up to speed with about a 3/4ths throttle, then backing off to feathering it. In reality it did 45 MPG on average brim to brim seemingly regardless of anything.


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#16 OFFLINE   warninglight

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Posted 18 July 2017 - 08:51 PM

I've just been to East London and back (605 mile round trip) in my 1997 V70 TDI Manual.

 

Aircon on all the way back, and loaded to the roof with student house stuff coming back as well as 2 of us int he front seats both ways.

 

Played a bit of a game, and by the time we got back it was showing 67mpg. As I'd only used 2/3 tank I filled up anyway to see what it actually was. Bang on 10 gallons, used the same pump I'd used before setting off and everything. It also crossed over 230,000 miles last week. In contrast,he last time I did it in my Rangie on gas I got 18mpg, and the time before that in an S60 D5 auto it was 42mpg but that did come back at speed with a bike on the roof...


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#17 OFFLINE   Tamworthbay

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Posted 18 July 2017 - 08:53 PM

My wife's 500 has just done a 70+ mpg tank, mostly motorway but 50miles of town driving. Still can't believe it's doing that as it seems above the quoted figures.

#18 OFFLINE   Stevebrookman

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Posted 19 July 2017 - 02:22 AM

I reset the trip computer om my Range Rover when I bought it 11 years ago and it is reading an average of 15.2mpg ( but we know these computers can be a little optimistic).

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#19 ONLINE   eddyramrod

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Posted 19 July 2017 - 04:35 AM

MPG?  Life's too short.  I drive a 7.7 litre Cadillac.


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#20 OFFLINE   twosmoke300

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Posted 19 July 2017 - 05:47 AM

I've recently nudged to Landy up to 15mpg ! Happy with that !
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#21 OFFLINE   chaseracer

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Posted 19 July 2017 - 06:53 AM

SF15, convoying between venues in a 'tired' 3.0 straight-six automatic W124, trying to keep the AS-bike BX estate in the rear-view mirror: 32 mpg...


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#22 OFFLINE   Bianconeri

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Posted 19 July 2017 - 07:13 AM

My wife's 500 has just done a 70+ mpg tank, mostly motorway but 50miles of town driving. Still can't believe it's doing that as it seems above the quoted figures.


How do you manage that? The old ( good ) one used to do about 50 in Mrs BN's hands, the new one seems to do about 35!
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#23 OFFLINE   Honey Badger

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Posted 19 July 2017 - 07:16 AM

19.8 MPG in the RX300 so far this tank, thats pretty much the average if I'm honest. 3.0 V6 auto.

 

I've once managed to get a 30mpg out of a tank on a drive down to Cornwall.

 

I'm quite pleased my wife gets a company fuel card.......



#24 OFFLINE   barefoot

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Posted 19 July 2017 - 07:20 AM

I once ran out of fuel at 196 miles from the 55 litre tank in the T2 - that was 13.6mpg.

 

To say I was unimpressed was an understatement, and that was the last time it was used for short journeys, nipping to the Co-Op etc.


94110.png94111.png94112.png439963.png


#25 OFFLINE   dollywobbler

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Posted 19 July 2017 - 07:47 AM

36mpg from the Honda is pretty bloody remarkable. It does seem to average 32-36 if I can resist unleashing the power.

26mpg in a Rover P6 V8 was a pleasant surprise.

Saab 9000 2.3 would deliver a genuine 34mpg. Not bad at all.
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#26 OFFLINE   cros

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Posted 19 July 2017 - 08:04 AM

My previous Rover P4 with a 2.5 tdi, 3.54 diff and overdrive did almost 50 mpg. It's replacement has a 2.5 4 cylinder, uses more twice the amount of LPG. It has a freewheel instead of an overdrive so wins in the novelty stakes. Costs about the same to run, nicer to be in but quite a bit slower. The gearbox is less likely to break too so I won't be going back to the evil derv.
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#27 OFFLINE   spike60

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Posted 19 July 2017 - 08:38 AM

53.3 mpg displayed on a 300 mile trip to Moffat and back in a sooty-necked and rapid 530d BMW estate. The reality fill to fill? 45.5mpg, good for what it is but no 53.3....



#28 OFFLINE   John F

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Posted 19 July 2017 - 08:44 AM

I averaged 64.5 mph on the way back from the Lakes trip last weekend. Bollocks to mpg.


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#29 OFFLINE   JayW

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Posted 19 July 2017 - 09:12 AM

Long term average on my X300's computer reads 19mpg. Actual figure as tracked by me on Fuelly is 16.5mpg. About 15% out.
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#30 OFFLINE   Magnificent Rustbucket

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Posted 19 July 2017 - 09:53 AM



Long term average on my X300's computer reads 19mpg. Actual figure as tracked by me on Fuelly is 16.5mpg. About 15% out.

 

 

You must do quite a bit of city driving - or be faster than me!

 

This is my long term average readout on my XJ40. It has been reasonably accurate when checked against petrol receipts.

 

 

35211066223_9bc683eba8_h.jpgP1130177 by *D*B*, on Flickr


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