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 Post subject: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 4:48 pm 
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Light Pressure Turbo

Joined: Fri Jan 09, 2015 7:22 am
Posts: 566
Location: Forest of Dean
Car Model: OG 9-3 SE
Filled my stage 1 Noobed 2001 9-3 up earlier and reset the SID mpg before driving 6 miles on an A road at 55-60mph, no stops or steep hills & it showed 42.8mpg for the trip.
Sounds very low for cruising in 5th at that speed?

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 4:52 pm 
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Joined: Wed Sep 13, 2006 12:44 pm
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Location: Bristol
Car Model: '99 9-3 ex-LPT '55 Diesel SW
Sounds about right to me, you can just about get 50 if you're slip streaming milk floats.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 4:57 pm 
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Light Pressure Turbo

Joined: Fri Jan 09, 2015 7:22 am
Posts: 566
Location: Forest of Dean
Car Model: OG 9-3 SE
Jules_ht wrote:
Sounds about right to me, you can just about get 50 if you're slip streaming milk floats.


OK, thanks

Thought I'd read stories of 50+ cruising on A roads

Not that I particularly believed them lol

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 5:33 pm 
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Light Pressure Turbo

Joined: Thu Sep 05, 2013 7:39 pm
Posts: 383
Location: Slough, Berks
Car Model: 2000 93 Aero (far from stock)
6 miles really isn't long enough of a drive to get a good reading. If you did a much longer journey, you'd probably see it get higher than the 42.8 that you saw. Also, the trip computer isn't THAT accurate, you're better off brimming with fuel and then brimming it again after a journey to get a more accurate result.

42.8 mpg actually sounds better than I've ever had from my OG 9-3 (also stage 1 noobed) but I do have a heavy right foot....


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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 7:40 pm 
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Joined: Wed Apr 11, 2012 11:33 am
Posts: 3637
Location: Colerne North Wiltshire
Car Model: GSXR1000 K2 Aero vert gone
I had a standard 2001 Aero vert. Driving to the posted limited on A and B roads in mostly light traffic I did average fractionally over 44mpg but it was hard work feathering the throttle and using maximum anticipation. That was over 258 miles measured using the same petrol station and pump and using satnav as a measurement for mileage. I did several "economy" runs, that was the best I achieved.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 8:21 pm 
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Joined: Mon May 07, 2012 6:41 pm
Posts: 1184
Location: somerset
Car Model: 93 2007 Tid vert 93 2000 vert
The best I ever got was 30mpg on Sid,
normally around 22mpg.
But as low as 15mph when having fun.
What's the point In remapping, to not get the grin factor. :corn:

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 9:03 pm 
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Light Pressure Turbo

Joined: Fri Jan 09, 2015 7:22 am
Posts: 566
Location: Forest of Dean
Car Model: OG 9-3 SE
Over a thankful I average 32-34, my commute is 6 miles A road 50-60mph, a mile through town then 10 miles motorway. I work shifts so rarely drive in heavy traffic.
Plus the odd 50-80 overtake on the A road :D

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 Post subject: Re: OG 9-3 MPG
PostPosted: Fri Oct 19, 2018 10:21 pm 
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Joined: Mon Jul 30, 2018 10:18 pm
Posts: 128
Car Model: 9-3 OG 2.0t 2003
My 9-3 OG Vert AUTO seems to be pegged at 26mpg and I drive like grandma on a lazy day through the country. Think the brakes are on!


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 Post subject: Re: OG 9-3 MPG
PostPosted: Sat Oct 20, 2018 5:58 pm 
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Joined: Thu May 05, 2011 11:09 am
Posts: 1387
Location: Aberdeen
Car Model: MY99 9-3 SE HOT
I wish I got near that :lol: mines roughly 20ish


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 Post subject: Re: OG 9-3 MPG
PostPosted: Sat Oct 20, 2018 6:54 pm 
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Joined: Mon Apr 02, 2007 11:52 am
Posts: 23232
Location: not in a SAAB.
Car Model: One of the first RHD 9-5s
Gaz38 wrote:
Jules_ht wrote:
Sounds about right to me, you can just about get 50 if you're slip streaming milk floats.


OK, thanks

Thought I'd read stories of 50+ cruising on A roads

Not that I particularly believed them lol


Plenty of stories claiming that sort of mileage but thats just from complete dreamers. The Diesels cant manage that sort of MPG, there is no way a Petrol will achieve it. In very specific circumstances and over a short distance you may see close to 50MPG but in the real world anybody claiming they are achieving much more then 30MPG long term are just kidding themselves.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Sat Oct 20, 2018 7:08 pm 
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Joined: Mon Jul 13, 2009 8:27 pm
Posts: 6042
Location: Bristol
Car Model: 234r 9-3 nail
og 9-3 b204.... on the most boring journey alive with a failing tyre i had to nurse home (at 45-55mph cardiff to bristol)
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 Post subject: Re: OG 9-3 MPG
PostPosted: Sun Oct 21, 2018 11:14 pm 
I'll concur, my diesel won't do it, best I saw was a 60mph cruise on flat and very very smooth tarmac with highly inflated tyres (something like 38 on the front and 44 on the rear) and the SID read 60mpg (though it lies liberally, its claimed 45 average on various roads, though realword more like 40)
Will see if the refurbed injectors make any difference to the economy or not...


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 Post subject: Re: OG 9-3 MPG
PostPosted: Mon Oct 22, 2018 5:56 am 
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Joined: Mon Feb 19, 2007 4:12 pm
Posts: 8032
Location: Portsmouth
Car Model: 96 V4 & 9-3 Turbo-X
Best real mpg i got was 35mpg on my stage 1, that was on long journeys.

Normal for my daily drive was 26mpg, but it was a very short run.

That was measured brim to brim on the tank. SID was frequently over reading by 5mpg or more. This was in a vert which has worse mpg than the hardtop.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Mon Oct 22, 2018 3:08 pm 
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Full Pressure Turbo

Joined: Fri Mar 09, 2018 9:53 am
Posts: 902
Car Model: .
not an og9-3 but an og 9-5, i get 40+ from a B205 auto used in manual with a light foot. my 2.2 tid gives me a decent average of 50mpg, ok so i drive like an old man, albeit i'm not one, yet ;) but if you go easy on the loud pedal, scan junctions and give yourself time for lights to go green, no reason why you can't get good mpg. i was drilled on telematic driving techniques by my employer 15 years ago, telematics hadn't come in then but he was a tight fisted so and so, easy on the gas, slow at junctions, let the traffic clear and roll up to lights, not everyones cup of tea but boy do you see good mpg in town, thus giving you the chance to give it the occasional heavy boot on the safer roads... don't hurt to be frugal, either that or get a prius... or suffer with a nasty 2.8V6 that no one really wants but defends it anyway lol


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 Post subject: Re: OG 9-3 MPG
PostPosted: Mon Oct 22, 2018 9:38 pm 
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Joined: Sun Jan 26, 2014 9:41 am
Posts: 2665
Location: Royal Tunbridge Wells
Car Model: '03 9-5 2.3 Vector Auto Estate
Just run around 550 miles in the OG9-3. Did not do a brim to brim but according to SID it was running at 39.5 up to the Wirral from Kent, mainly motorway at 60-65 (although much of the M6 is 50 limit). On the way back today I had the top down all the way, got stuck in traffic jams a few times including 45 mins+ jam to get in and out of Banbury for a quick stop and an accident holdup on the M25, plus crawling for miles around the Heathrow section, but did open up nearer home to 70+ on the M25/26 and A21. SID reported 37.5 at the end of it all which I did not think was bad.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Tue Oct 23, 2018 9:32 pm 
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Joined: Sat Apr 23, 2005 6:13 pm
Posts: 26442
Location: Whitley Bay
Car Model: 96, C900, 9k, 9-3 & 9-5
On a run I get about 30-32 mpg from the DE (2,0t auto estate) The 2,2 oil-burner (manual estate) we had before would do about 34 mpg on a similar run.
I can't help but think topography plays a significant role. Round our way, you don't go very far without a change in altitude. Once I was coming back from Edinburgh with the intention of trying to get some decent mpg figures. I decided to travel at 60mph as far as reasonably practical. Going round the Edinburgh City Bypass the figures were looking good, well north of 40mpg. Then I turned off on the A68 and it all went south, as it were (pun intended!) Ended up around 30 mpg, driving like a nun.


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 Post subject: Re: OG 9-3 MPG
PostPosted: Tue Oct 23, 2018 9:43 pm 
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Light Pressure Turbo

Joined: Fri Jan 09, 2015 7:22 am
Posts: 566
Location: Forest of Dean
Car Model: OG 9-3 SE
Just filled mine up this evening, SID gave an average reading of 32.4mpg, actual MPG full tank to full tank was 34.8.

That's for my regular commute as described in my earlier post, so overall pretty good for a 17 year old car with 220bhp I think

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 Post subject: Re: OG 9-3 MPG
PostPosted: Tue Oct 23, 2018 9:52 pm 
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Location: Glenrothes, Fife
Car Model: 95, 99, 900, 9000, 93, Sonett
For some reason the diesels seem to vary from car to car. My regular work car often returns 50-55mpg week in and week out, fully loaded with tools. My wife's identical car barely achieved much above the low 40s, admittedly the engine destroyed itself not long after that. I noticed that my car has taken a significant hit since changing from 16" SE wheels to 17" Double Ys, at least 5mpg for some reason. Changing to winter wheels shortly, so let's see what happens then.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Wed Oct 24, 2018 6:47 am 
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Joined: Mon Feb 19, 2007 4:12 pm
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Location: Portsmouth
Car Model: 96 V4 & 9-3 Turbo-X
Larger rotating mass and moment of inertia (where the mass is located vs the axis of rotation) needs more torque to give the same accelleration so you press the pedal harder? Shouldnt have thought the slightly larger wheels and tyres would have that big an effect though.

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 Post subject: Re: OG 9-3 MPG
PostPosted: Wed Oct 24, 2018 8:08 am 
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Joined: Wed Sep 13, 2006 12:44 pm
Posts: 12468
Location: Bristol
Car Model: '99 9-3 ex-LPT '55 Diesel SW
beardydave wrote:
Larger rotating mass and moment of inertia (where the mass is located vs the axis of rotation) needs more torque to give the same accelleration so you press the pedal harder? Shouldnt have thought the slightly larger wheels and tyres would have that big an effect though.


Particularly where the larger sidewall profile of the tyres used on smaller wheels makes the overall rolling radius very similar.

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