fuel consumption in reality [Archive] - SaabCentral Forums

: fuel consumption in reality


900i-16
01-03-06, 11:20 AM
Can any 9-7x owner give actual figures of their fuel-consumption or confirm the figures saab announces ?

I checked the belgian brochure (in l/100 km - don't know what that is in mpg):

4.2 in-line 6 290pk/213kW =
22,5 l / 100 km city
13,4 l / 100 km highway
16,7 l / 100 km mix

5,3 V8 300pk/221kW =
20,7 l / 100 km city
12,4 l / 100 km highway
15,5 l / 100 km mix

Are those to optimistic or correct ?
I suppose the lower figures with the 5,3 V8 all have to do with DOD ?

By the way, I checked saab's figures for the 2,2 TiD in a 9-3 (2000):
8,3 l / 100 km city
5,0 l / 100 km highway
6,2 l / 100 km mix

These are more or less OK, in reality i do a lot of short distances and the outcome is often between 8 and 9 l / 100 km.
5,0 l / 100 km i managed to reach only twice (in a +/- 1000 km trip), but once some stop and go traffic is added the average consumption goes fast up to 7 l / 100 km.
6,2 l /100 km in mixed use is much to optimistic, more between 7 - 8 liters, but of course depends on driving style a lot.

So, any 9-7X-experiences to share?

Canuck22
01-03-06, 11:45 AM
I just bought mine a week and a half ago, about 700 miles on the clock. I'm averaging about 17-mpg overall. It should improve when the engine loosens up a bit.:

dbluegoat
01-03-06, 02:53 PM
I get about 14-15mpg 90% local city driving

have about 5,000 miles on it in the last 6months

V8

jgmiller
01-03-06, 10:08 PM
Before this weekend I had about 1,000 miles on mine and was getting about 16.5 with about a 50/50 mix of city and highway driving. This weekend we took a trip to Vegas and I was hoping to see some nice steady highway numbers but got only about 18 on it. However after thinking about it I realize this might not be realistic highway numbers. Going up Cajon Pass and some of the other passes to Vegas really sucks the gas, plus we were transporting some heavy stuff. Also as everyone knows it's impossible to go less than 80mph to Vegas so I wasn't exactly being light on the throttle.

I did try an experiment the other day that was promising. I gassed up just after leaving work and immediately got on the freeway with no traffic. By the time I got home it was showing 20.7 on the MPG display. That was about 26 miles of constant freeway speed of around 65mph.

Frankly I never believe the ratings anyway, when I decided to buy I figured if I got 18 mixed then I'd be doing good. So 16.5 is close and it might get better.

Lodro
01-03-06, 10:30 PM
y the time I got home it was showing 20.7 on the MPG display. That was about 26 miles of constant freeway speed of around 65mph.

Frankly I never believe the ratings anyway, when I decided to buy I figured if I got 18 mixed then I'd be doing good. So 16.5 is close and it might get better.

18 would be quite respectable I'd think. Really 16.5 isn't too bad considering..do you have the V8? Your highway test is probably the rosiest scenario imaginable. For reference I've gotten up to 27.5 in my Outback XT in same conditions..but daily I get about 22.5..but that is with a lead foot and driving canyon interstates at 80.

jgmiller
01-03-06, 10:37 PM
Sorry I should have noted it was the 4.2 not the V8. Although according to their own MPG estimates there's only a 1MPG difference. You're correct 16.5 isn't bad, it is a heavy vehicle after all. The Toureg gets even worse mileage for their 6cyl and it's about the same weight.

Swade
01-03-06, 10:42 PM
That load in the back would make a difference too. I get a few points difference just having a couple of boxes in the back of my Viggen. I'm sure a loaded-for-a-trip SUV would feel the effects.

Corvette97x
02-03-06, 03:28 PM
I have a 2005 9-7x 4.2i. I have a 1.7 mile commute to work (life is hard in DC suburbs, LOL). I do mostly town driving, and I average around 16.8 mpg. I traveled to Raleigh, NC at Christmas, and reset the MPG gauge. I averaged just over 20 mpg for the freeway drive (mostly between 75-80 mph), so freeway driving should average around 21 within the confines of the speed limit, and a mix should be around 17 mpg average.

Way better than the 14.8 on the freeway of the Sierra I owned before, but not nearly as good as my 1998 corvette 6-Speed (which on the freeway will get around 33 mpg, and around town I get 22.5) with 375 hp at the crank....

PDX_9-7X_5.3i
06-03-06, 11:23 AM
I've got about 5,000 miles on my 06 9-7X 5.3i and I still get 14 - 14.5 MPG average per tank full. I love that V-8 but half my driving is over 55 MPH going to work! Does this sound right?

jgmiller
06-03-06, 12:33 PM
That does sound low, of course a lot depends on the little things you do. I've read that just how you start from a red light can have an impact of 10%-20% on MPG. Do you accelerate hard from a red light? Also I've read a few things that say the grade and brand of gas actually can make a significant difference . What grade of gas do you happen to be using?

PDX_9-7X_5.3i
06-03-06, 01:08 PM
I'm sure I leave from a stop faster than most. The 5.3 has so much torque it's hard not to be the first one off the line :)

I run Cheveron regular about 95% of the time.

Corvette97x
06-03-06, 04:53 PM
I'm sure I leave from a stop faster than most. The 5.3 has so much torque it's hard not to be the first one off the line :)

I run Cheveron regular about 95% of the time.

I have noticed with my 4.2i that my fuel mileage increases a little running the 89 octane gas. Best way to protect your engine is to change gas brands with each tank. Each oil company adds different detergents and additives to their fuel, so the best situation is to vary this to get the most additives for the engine.

Try 89 for 2 tanks, see if the mileage increases.

jgmiller
06-03-06, 06:41 PM
I found a study on the web a while back where an engineer took the time to experiment with his cars and different octanes, brands and stations within a brand. He found that it was possible to have all 3 affect the performance and economy to a pretty significant degree depending on the combinations. Right now in my 4.2i I'm running 89. As an experiment I might try moving to 87 and see what happens for a few tanks.

mike saunders
06-03-06, 08:13 PM
I'm sure I leave from a stop faster than most. The 5.3 has so much torque it's hard not to be the first one off the line :)

I run Cheveron regular about 95% of the time.

Uh...Hey, AJ Foyt...You really don't have that much torque. I'd race you in a heartbeat, even from a dead stop.:lol:

You have a bit more torque than a mildly modded Saab 9-5 Aero, but weigh 1,800 pounds more. You're nearly 2,000 pounds heavier than my car, and I've got about 300 ft/lbs at the wheels (so about 345 at the crank)

I think you better pick on someone your own size...:cheesy:

Corvette97x
07-03-06, 01:11 PM
Uh...Hey, AJ Foyt...You really don't have that much torque. I'd race you in a heartbeat, even from a dead stop.:lol:

You have a bit more torque than a mildly modded Saab 9-5 Aero, but weigh 1,800 pounds more. You're nearly 2,000 pounds heavier than my car, and I've got about 300 ft/lbs at the wheels (so about 345 at the crank)

I think you better pick on someone your own size...:cheesy:


What do you have that runs these #'s. Let's have fun, I have 400hp and 400 ft/lbs at the crank of my 2005 vette, and about 390hp and 380 ft/lbs on my '98 vette.... hmmm... racing is fun....

mike saunders
07-03-06, 01:29 PM
What do you have that runs these #'s. Let's have fun, I have 400hp and 400 ft/lbs at the crank of my 2005 vette, and about 390hp and 380 ft/lbs on my '98 vette.... hmmm... racing is fun....

If you're quoting crank numbers, subtract 15 percent for actual wheel HP and TQ due to drivetrain loss. So you're maybe 360 at the wheels for both hp and tq.

A 2.3L Saab engine with a GT3076 turbo will do 400 whp and 450 wtq. Stock bottom end, no forged pistons required. Check out some of the Saab 9000s at www.maptun.com (http://www.maptun.com)

To be fair: With its wider rubber and lower gearing, a Vette would crush it off the line. From a roll, however, the modded Saab would be pretty formidable.

best of all, is that the turbo is very fuel efficient. 32-35 mpg on long trips is pretty common.

Corvette97x
07-03-06, 02:04 PM
If you're quoting crank numbers, subtract 15 percent for actual wheel HP and TQ due to drivetrain loss. So you're maybe 360 at the wheels for both hp and tq.

A 2.3L Saab engine with a GT3076 turbo will do 400 whp and 450 wtq. Stock bottom end, no forged pistons required. Check out some of the Saab 9000s at www.maptun.com (http://www.maptun.com)

To be fair: With its wider rubber and lower gearing, a Vette would crush it off the line. From a roll, however, the modded Saab would be pretty formidable.

best of all, is that the turbo is very fuel efficient. 32-35 mpg on long trips is pretty common.

With the 6-speed in my 1998, I can cruise at 75mph at 1500 rpm, and get about 34mpg on the freeway. All with a push-rod V8. (the one car that chevy really has done right lately).

mike saunders
07-03-06, 02:14 PM
With the 6-speed in my 1998, I can cruise at 75mph at 1500 rpm, and get about 34mpg on the freeway. All with a push-rod V8. (the one car that chevy really has done right lately).

Agreed about the pushrod V-8. It's the epitome of "If it ain't broke, don't fix it."

Sure it's low tech...so what!

There have been something like 90 million V-8 engines made over the last 50 years, so the General definitely did something right.

Corvette97x
07-03-06, 05:26 PM
Mike Saunders,

I am planning on ridding myself of the 2001 Grand Prix that I have. 3.1L V6. What is the maintenance cost for a 9-3 Viggen (2000 or 2001). I would like to purchase one (silver sedan preferably), and am curious as to what the cost would be to maintain one.

Thanks,
Phil

mike saunders
07-03-06, 06:10 PM
Mike Saunders,

I am planning on ridding myself of the 2001 Grand Prix that I have. 3.1L V6. What is the maintenance cost for a 9-3 Viggen (2000 or 2001). I would like to purchase one (silver sedan preferably), and am curious as to what the cost would be to maintain one.

Thanks,
Phil

Hey Phil, I'll be happy to answer that. Swing by the NG900/9-3 Performance section and I'll post a more detailed answer there.

These kind folks have patiently endured a threadjack I'm partially responsible for...

Racerx
07-03-06, 08:28 PM
Well our 9-7x w/ 4.2i is getting 16 in the city & 22 on the highway with 2590 miles on it. We had the '02 Bravada before this and we did 18-23 City Highway at 56,000 miles. The break in period on our Olds was honestly around 7500 miles before the mileage improved. I also ran synthetic in it and haven't made the change yet but we improved our mileage on average 2 mpg running 0-40 M1 all year. Don't worry-won't harm the engine(my wife worked for the dealership and they gave us the nod to switch). Anyway I expect 18-22 again since we have the same set up just improved handling & braking.

Matador
08-03-06, 09:31 AM
Are you folks using regular or premium gas?

mike saunders
08-03-06, 09:50 AM
Are you folks using regular or premium gas?

Anyone using premium on this light truck might as well throw C-notes out the window at every stop light.

The higher octane of premium gas is primarily to reduce pinging in performance engines, or at higher elevations when a car is under load. In its normal use as a suburban grocery getter, the 9-7x will be just fine with 87 octane. If you're towing anything, or heading into the mountains, then 89 or even 93 is probably better. If you have a leadfoot and like to punch it at lights, you might see a slight performance benefit from higher octane. :cool:

The stock engine management computer will accept a pretty wide range of gasoline grades. I don't know whether the 9-7x electronics adjust spark and engine timing the way Trionic works in turbocharged Saabs.

jgmiller
08-03-06, 11:08 AM
89 right now. I'll probably move down to 87 in a while and see how it is. I just can't break the habit from years of putting 91 in my cars.

900i-16
10-03-06, 06:48 PM
Thanks for sharing mpg-info.
Can anyone do a conversion from miles per gallon to liters per kilometer?

Nimisys
10-03-06, 09:56 PM
I don't know whether the 9-7x electronics adjust spark and engine timing the way Trionic works in turbocharged Saabs.
both engines use knock sensors to detect pinging (i know the 5.3 uses twin sensors) and the ecm will adjust fuel and ignition timing on a per cylinder basis. best bet is to use what the manual reccomends, which i believe is 87 octane in the US. only thing really to do is have a good fuel induction system cleaning performed every 15k or so. the electronic throttle control actually moves the blade in the throttle body for idel control so it is fairly sensitive to carbon build up. keeping it clean is all you need to really worry about fuel delivery wise.