Best MPG

[dibbly dobbler]

Ok so this is nothing but a thinly veiled platform for me to boast but lets have your best MPG - please state model, describe the route, and what MPG you achieved

Model: 2008 E90 330i (ED), manual
Route: Edinburgh to York and back (basically a 420 mile trundle - mostly A road, bit of dual carriageway, bit of town work)
Result: 41.5mpg

[Quinten]

I'll just put this here, so everyone else feels good about themselves

Model: 1999 E39 M5
Route: Holland to UK
Result: 24.7 mpg average over 369.6 miles

But I've only been keeping tabs on things since April: http://www.fuelly.com/driver/quinten/m5

[rich_vw]

Model: 2008 118d (ED) M Sport
Route: Bangor, Gwynedd - Norwich, Norfolk (295 miles mainly dual & motorway to near Coventry the A, B & C road)
Result: 67.2mpg OBC...reset all bits before setting off

[texasjohn]

Model: 2007 130i M Sport (not the new 'direct injection' engine)
Route: Derbyshire - Stevenage (100 miles mainly A roads & motorway)
Result: 43.4mpg OBC

[ghibbett]

Model: 2000 Z3 M-Coupe
Route: Warwick to Graz (Austria) via Nurburgring and Austrian Alps (1150 miles of Autobahn and mountain passes)
Result: 32.5mpg calculated

Model: 2005 330i Sport Auto
Route: Graz - Berchtesgaden (Germany) - Salzkammergut (Austria) - Graz (370 miles of Autobahn and mountain passes)
Result: 34.1mpg OBC (35.2mph calculated)

[to3m]

Car: 2001 320d (150hp) manual
Where: A roads, then Surbiton to Sheffield (motorway, mostly 70mph).
Result: 48.29mpg (car said: 52.3mpg)

Car: 2001 330d manual
Where: Sheffield to Surbiton, then back (motorway, mostly 70-75mph).
Result: 45.67mpg (car said: 48.7mpg)

BTW these two journeys are the most accurate fuel economy thoughts either car ever had, and by quite some margin. (normally it is more like: "36mpg, car says: 44mpg"...)

[smashy]

One night coming home on the M4.A little test to keep me awake.120d auto ED

resetting OBC each time. 80mph for 10 miles got 47mpg.

70mph for 10 miles got 56mpg.

55-60 mph (lorries!!!) for 15 miles got 72mpg!!!

Edited by smashy on Monday 22 August 22:05

[sparks_E39]

1999 BMW 528i SE Auto
Richmond London to Poole Dorset, 95 miles 60 mph cruise control on , 11pm no traffic 1 mate with me.

42.5 mpg, did reach 45 mpg briefly. In traffic at 7am that's normally a 35-38 mpg journey.

[steve_bmw]

Model: 2003 Z4 2.5
Route: chesterfield to gaydon, and back home 200 mile round trip.
Result: 40.8 mpg over 200 miles, cruise at 75 mph on mostly motorway.

[gizlaroc]

Wymondham to Sheringham, Norfolk and back again, round trip of 80 miles on a Bank Holiday Monday traffic, so sat at pretty much 45-55mph all the way and the torque convertor was locked up for probably 80% of the journey.

2007 320d with the newer ZF Auto gearbox, sport touring.

[texasjohn]

gizlaroc said:

Wymondham to Sheringham, Norfolk and back again, round trip of 80 miles on a Bank Holiday Monday traffic, so sat at pretty much 45-55mph all the way and the torque convertor was locked up for probably 80% of the journey.

2007 320d with the newer ZF Auto gearbox, sport touring.

That's very good!

[dibbly dobbler]

It's kind of depressing how much better the mpg is if you go a bit slower! I wonder what the optimum speed actually is ? 40mph in top ?

[gf15]

72.4 MPG,
I cannot achieve this going down hill with the engine off,although I came close on a 240 mile journey with my previous 740i (admittidly 200 of those miles were on the back of an AA lorry).

[gizlaroc]

dibbly dobbler said:

It's kind of depressing how much better the mpg is if you go a bit slower! I wonder what the optimum speed actually is ? 40mph in top ?

I think it has more to do with being lucky, right ambient temps, correct tyre pressures and constant movement without getting held up at junctions, lights, etc. etc.

The official test is an average of 39mph over 7 miles with a car up to temp on a warm day to get the extra urban figure.
Repeatable? hardly.

[Evangelion]

Is it true that you get better mpg when you use the cruise control because it can stick to a constant speed more accurately than a human being can?

Or am I talking bks?

(If past experience is anything to go by, and it is, I suspect the latter.)

[to3m]

Whenever I switch cruise control when driving on the flat, the MPG swingy thingy always goes at least a little higher, no matter how lightly I've been pressing the pedal. I figure it's generally going to be at least a little bit better than your foot - seemingly better than mine, at any rate - since it can meter the fuel out more accurately. Certainly, I noticed my car's fuel economy increase when I started using cruise control on my commute.

Obviously if doing it all yourself, you might let the car slow down a bit when going up an incline then speed up due to gravity when coming back down, or what have you - couldn't really say. Where I live doesn't really have inclines, it's just either steep hills, or perfectly flat. Seems like cruise control is better on flat ground, at any rate.

[the_kato]

2003 320cd M Sport

Maidstone - Wincanton

41.1

Everywhere I look that seems low, and I can't figure out why because that was driving like a granny. Temp gauge reads just under 12 o'clock all the time so maybe the thermostat is dicky

[Mustard]

2001 E39 525i Auto

Worcestershire to just shy of Aberdeen (420miles)

34mpg (Cruise set at 85mph most of the way, a genuine 80mph according to GPS)

[sparks_E39]

I got 550 miles out of my E39 tank once hooning across Europe.

Anyways with cruise on my mph increases noticeably. I bloody love wafting

[obscene]

420ish miles out of an E46 330 tank and could have done more/filled up later. That was quite a feat for Mr.Leadfoot here.