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  #1  
Old 17th September 2012
benkovian benkovian is offline
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Default Saab 9-5 poor gas mileage question

I'm new to this forum and I own a 2003 saab 9-5 linear automatic. I have been averaging between 18-21 mpg with premium even after replacing the oil and the spark plugs. Is there any other easy things I can do to get better gas mileage because I do not drive in the city all country roads or highway so I think I should be doing better. Any help would be appreciated thanks.
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  #2  
Old 18th September 2012
slbenz slbenz is offline
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Have you changed the air filter, check the air pressure in your tires? Do you experience what sounds like knocking or a misfire or rough idle? Could be your CPS. When mine was replaced, my freeway gas mileage went up 4-5 mpgs. Back to 32-33 mpgs on the highway. I have a 2000 Aero wagon.
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  #3  
Old 18th September 2012
Norm95 Norm95 is offline
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Tire pressures and alignment along with a conservative driving style help. Start hitting the ECON button on the HVAC this time of year to shut off the AC. Airconditioing sucks about 2 mpg on hwy cruise.
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  #4  
Old 18th September 2012
inteller inteller is offline
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check your battery too....I just replaced mine and my mileage shot up....apparently not getting a good spark.
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  #5  
Old 18th September 2012
Jssaab Jssaab is offline
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Obvious question did you use the correct ngk plugs for your car? Was the mileage bad before the tune up?

If so three things engine temp so the temp gauge regulates fuel based on engine temp. Maf clean that, di could be on it's way out.
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  #6  
Old 20th September 2012
benkovian benkovian is offline
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The spark plugs were the right kind and the air filter is fairly new, but I do have a rough idle that goes away after you raise the rpms by a couple hundred, what exactly is the CPS and how could it affect my mileage?...And I have been wondering what the ECON button does, so all it does is turn off the air conditioner? Thanks
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  #7  
Old 20th September 2012
rayodunne rayodunne is offline
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Check your vacuum lines at the throttle body. Actually check them all or replace them all!
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  #8  
Old 20th September 2012
first-saab first-saab is offline
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I also noticed improvements after replacing the DIC and oxygen sensors. Many parts playing a role here. I still get 30-32MPG on the open road.
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  #9  
Old 25th March 2013
yma yma is offline
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Default Battery, battery, battery!

Quote:
Originally Posted by inteller View Post
check your battery too....I just replaced mine and my mileage shot up....apparently not getting a good spark.
inteller,
I signed up to thank you for your hint about the battery. I had crappy gas mileage, and I had tried everything I could think of: CPS sensor, O2 sensor, I tried both my DICs and both my MAFs, tran fluid... nothing solved it.

I saw your comment and realized my battery didn't crank strong recently... New battery, a few pulls for training, clear mpg memory and VIOLA!!! gas mileage went up by 7mpg! Now I get 32-33mpgs on a conservative highway drive @65mph.

My symptoms were:
1. intermittent rough (sometimes very rough) idle both in P and D.
2. slow pickup specifically after being stuck in traffic
3. terrible mpg
4. jerk when changing gear (auto trans)
5. (not a symptom) the car never refused to start. Even Autozone discouraged me to get new battery as the battery tested OK on their test! wtf???

All symptoms are solved by new battery.
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  #10  
Old 25th March 2013
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Adam044 Adam044 is offline
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damn V6 only gets 20MPG which it what it says it should get. 16 City 24-26 Highway I believe it is
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  #11  
Old 25th March 2013
inteller inteller is offline
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you are limited by that ancient AW50-40LE. Best I could ever muster out of my 01 was 26 and that was all highway. I can get 26 without even trying hard in my 06 with the 5 spd.

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  #12  
Old 25th March 2013
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philselmer philselmer is offline
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Quote:
Originally Posted by inteller View Post
you are limited by that ancient AW50-40LE. Best I could ever muster out of my 01 was 26 and that was all highway. I can get 26 without even trying hard in my 06 with the 5 spd.

Wow, we have almost the same number of fuel-ups!

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  #13  
Old 25th March 2013
inteller inteller is offline
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well did, I sold that car, but it is easy to see how much better the 5 spd helps in gas mileage.
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  #14  
Old 25th March 2013
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Quote:
Originally Posted by philselmer View Post
Wow, we have almost the same number of fuel-ups!

Is this an app? On online only?
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  #15  
Old 25th March 2013
inteller inteller is offline
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Quote:
Originally Posted by Adam044 View Post
Is this an app? On online only?
there is nothing fancy about Fuelly. you create an account and then enter in your fuel up details at m.fuelly.com each time and it starts to build a record. The more data you give it the better it works.
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