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Discussion Starter · #1 ·
Year, location, mileage, etc?

I'm just curious. I pulled the numbers for the first time on my 86 900s NA 5spd with 280k on the clock. I filled it up, drove hard for 3 days, then topped it off at the same pump at the same station.

25.2mpg

Nice. I should hit 28 easy when driving like a sane human being.
 

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1989 900t hatch
cape coral florida
averaging about 18 mpg over the last few months.....friggin gas hog automatic
 

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Discussion Starter · #4 ·
Is there anybody good at spreadsheets that can build this table, normalizing for location? I suck at spreadsheets, but I'm willing to try if nobody else can...
 

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It is so difficult to get decent numbers because of how the operating conditions and driving styles vary... FWIW my 90 900 T was giving me always around 22 mpg average (but it had a small leak at the fuel filter) and my 91 900 T vert was giving me about 27 mpg last summer.

My commute with the 90 was about 7,5 miles that were often driven up to 90 mph while with the vert it was more like 18 miles driven at speeds up to 9 mph (well not so bad, but usually getting stuck in the rush hour)
 

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US galls are different to UK galls, but yesterday I drove the wife's vert 16v lpt, auto to pick up another 900(34th:cheesy:) with her 40 mls going to work and then 220 mls to collect it registered 25+( me driving lol) which is about average for a lpt auto, but on the way back she got 30+ which is the best ever for the car why 5mpg difference no idea as topped up both times to brim., but probably because there was no stop/ starting which eats petrol anyway, but a good 220 miles on motorway + A roads, and hardly and gear change, but manuals should do 30+(UK) easy as they have the extra gear as 3=top in an auto is about same as 4th in manual, but I filled the 'new ' one to the brim and will fill up during the week and put what I have got, as I do 300 mls a week so with my 'long' collection journey and my steady 50 mls a day to work I should get some excellent mpg this week:cheesy:, as had the AMM playing up on my other 900 and varied from 26 to 31 according to how much the amm(CEL light) light was on and not functioning properly, so watch this space, but previous best I ever had once was 34.5 mpg std 900i
 

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but on the way back she got 30+ which is the best ever for the car why 5mpg difference no idea as topped up both times to brim.
Direction of wind in a 900 can make a big difference to mpg figures. I reckon up to 4 or 5 mpg if you're cruising around 80+. Anyway, that's my experience. I'll post my mpg figures soon as I get back from socialising. I've had 40+mpg from my 900T vert on one occasion. UK imperial galls of course.
 

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Before you consider any figures obtained from your 900, check to see if your odometer is correct. Mine reads about 7% over what it should. Easiest way to check if you do not have GPS is to check it on a freeway with mile markers. Write your mileage down when you get on the freeway, and note the mile marker at that point. When you get off, compare your odometer to the mile marker. You should drive at least 50 miles for an an accurate result. For example, if you drive past 50 mile markers and your odometer says you have driven 53.5 miles, your odometer is over 7%
 

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I just upgraded to red fuel injectors and a raulturbo chip for the fuel and I am still getting 26-28mpg locally [into the boost often]. I haven't had a long enough trip to check my highway but it should easily aproach 30+ mpg.
 

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I've been averaging 28-35mpg (imperial) since converting to a manual 5sp.

I've been keeping records since I got the c900 by noting the odometer readings between top-ups, and this is the result...



As you can see, there was a looong period after I got the car and couldn't locate a timing light to set the timing right. BIG difference after I set it to a stock 16deg, as you can see from the blue "instant" line and the yellow average line.

Shortly after that, my Dad had surgery, which coincided with me being between jobs, so I drove up to Malaysia frequently to visit him in the c900, leaving the family car for the wife in Singapore - notice the group of really low consumption around Q3 of 2008.

Another significant event was when I converted to a manual type 6, when the consumption improved by another significant amount, around Sept 2009. The dip in end-Nov 2009 was a trip to Malaysia.

My consumption isn't the best around, but with 50% AC use, poor aerodynamics with the roof down, extra weight on a convertible, an LPT with max boost set at 0.6bar and Singapore urban driving, it's not too bad for a 17-year old car.

If anyone's interested in my Excel s/sheet which produces this chart, PM me.

James
 

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My '86 N/A sedan gets approx. 22mpg for 100% city driving and approx. 30mpg for lightly loaded 100% highway driving at 70mph or less. I drop about 2mpg if I drive 75mph instead of 70mph or if I have a heavy load of luggage. For the more common mixed driving, where I would estimate that 2/3 of the driving is highway, I get a pretty predictable 24-25mpg every time.

The '89 turbo has become my wife's daily driver. It typically gets a little better on the highway and will sometimes get more than 30mpg while not dropping of much at 75mph. It will typically get about the same as my 8v N/A for city driving and mixed driving, but considering the additional power that is really saying something in my mind.
 

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Both my 900Ts give very similar fuel consumption figures. One is a '93 3door T16 with 150k miles, the other a '94 T16 vert with 90k miles. Both 5 speed manual. I don't do traffic light grands prix any more. I've grown up and I value my gearbox. Anyway, in my opinion, that's not what Saabs are about. I'm an outside lane driver and I will overtake if conditions permit. I just love the grunt of a tuned turbo motor in top gear. I normally cruise at 80-90 mph, wife, blue lights, and conditions permitting. Both cars return 28 +/- 1 mpg (UK) on give and take mainly highway driving. Mainly town, gives 22. Recently. on a 800 mile round trip up North in the UK the 3door, much to my surprise, returned 32 mpg (UK). Two years ago, whilst touring in Scotland in the vert, with the hood down, yes they do fine weather sometimes, returned 41 mpg(UK) over a 1000miles. Yes, that was remarkable, but that was cruising, rarely going over 60mph, with only the occasional boost, 'cause we all love that feeling. Neither car uses any oil between changes (5000-6000 miles). Also, it's worth mentioning again, that wind direction can make up to 5mpg difference in consumption figures on a return journey. So if you've got a good tail wind the figures are going to look good. My odometer is within 1% of my satnav on distance.
 

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I've noticed that Brits seem to get roughly the same MPG figures as Americans but their gallons are bigger. What's up with that? (well aside from the 41 MPG (Imp) = 34 MPG (US) which is pretty good)

Like for example mmoe, above peva says he gets 22 MPG US in 100% city driving, and peva quotes 22 MPG Imp in mainly town driving, but his gallons are 20,3% bigger. peva quotes 28 MPG Imp on high-speed cruising, and mmoe says 30 MPG US minus 2, which is... 28 :lol:
 

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Discussion Starter · #15 ·
Yeah, that's why I was hoping for a guru to come up with a way to normalize the data. Convert everybody to liters per klick or something.

Considering my elevation here (6k feet) and all the hills and the way I was driving, I'm darn happy with my numbers. My old VW bus barely gets 20mpg and my wife's Exploder might see 19 if I baby it.

As for the Brits getting better numbers... Hmm... Could the Lucas electrics be more efficient than the Bosch?!?!?! :eek:
 

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MPG into KPL

English gallons vs US gallons. Just to add a bit more confusion to the topic what about the countires that use metric.............. kilometres and litres ? good luck with the calculations and conversions.

Hot and or humid weather seem to effect my 900 Turbo, auto. I guess depending on the weather I'm getting some where between 8 to 10 K's per litre. Dont know how that translates into MPG
 

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As for the Brits getting better numbers... Hmm... Could the Lucas electrics be more efficient than the Bosch?!?!?! :eek:
No my point was they were worse, since UK gallon is bigger it should be always more miles ;)

L/100 km is the metric standard used, usually. Conversion is simple - 100 km is 62,5 miles and 1 US gallon is 3,78 litres. Or, just take the inverse of the L/100 km number and multiply by 235 to get MPG in US gallons.

If you want to write an equation for MS Excel that would be really easy. Let's say you have L / 100km in column A, and you want to have MPG in US gallons. Just write this in the box:

=235*(1/A1)

Then click on the bottom right hand corner of the cell and drag it down to make the column.
 

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Sorry about this you guys over the pond in US. We Brits like our proper sized gallons. Don't know why you've been short changed.
 

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I have a 85 900i 8v that gets a steady 32 to 35mpg and a 89EMS that is doing the same if not slightly better.
An NA will always be better than a turbo. It's not squirting as much fuel in and the higher compression ratio helps. Still, not bad figures.
 
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