how many miles are you guys getting to a full tank of gas? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 01-16-2005, 02:51 PM   #11
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30'ish freeway, sometimes as much as 34-35, in my SSE during the fall, but now with the bitter cold I'm down to 16 mpg!!!!?!?!?!?!? Same with my brother in his Olds LSS (same engine and tranny as my SSE), and my sister'* 1997 Grand Prix GT seems to be on the same boat the LSS and SSE -summer up to around 27mpg, and now 215 from the pump to stranded at the side of the road in -15*F temps.
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Old 01-16-2005, 02:55 PM   #12
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20 city 30 highway. We'll have to see how I do with the new PCM and having to run 93 octane now to compensate for the more aggressive timing.
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Old 01-16-2005, 03:35 PM   #13
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I typically see 300 miles to a tank(always fill when the low fuel light goes off, 11.5-12 gallons). I once got 41mpg, and I do have the witnesses to prove it.
This winter is killing my mpg though.
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Old 01-16-2005, 03:53 PM   #14
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Jrs3800: Do you think that our intake has anything to do with it? Because someone here mentioned the plastic intakes that were in the 92 and later models flowed better.. and it could be perhaps that the intake restriction decreases fuel economy?

A tune up is a must for great fuel efficency. I get 19mpg for a reason. My air filter looks like 10,000 mile oil, my o2 sensor was gone, plugs rusted, and plug wires had 2k+ ohms resistance.


-justin
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Old 01-16-2005, 06:06 PM   #15
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Quote:
Originally Posted by smellbird
I typically see 300 miles to a tank(always fill when the low fuel light goes off, 11.5-12 gallons).
11.5-12 gallons to full from the low fuel light?!?!?!?!? If I let my low fuel light go on I have to put in 17 to 17-1/2 gallons. What did you do? Swap tanks with a Sunfire?
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Old 01-16-2005, 06:16 PM   #16
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Quote:
Originally Posted by smellbird
I once got 41mpg, and I do have the witnesses to prove it.
This winter is killing my mpg though.
That was a good trip!

Do the sugessted tuneup, but it'* no good if you keep the pedal down.
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Old 01-17-2005, 01:08 AM   #17
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wow you guys get alot of miles, for me i get in my 95 bonneville with a full tank of gas about 228 miles of city driving and i dont have a heavy foot, car runs strong i think i should be able to get more miles than about 228?
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Old 01-17-2005, 01:18 AM   #18
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Bella was getting about 240in town... 300freeway/city... I got like 340 freeway...
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Old 02-03-2005, 06:54 PM   #19
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All city driving and warm up times(It was cold up here):

128 miles on 7.754 gal = 16.5 mpg

All highway driving:

120 miles on 4.255 gal = 28.2 mpg

Driving around town hurts...
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Old 02-03-2005, 08:54 PM   #20
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I never run it right down to the bottom of the tank so I'm not sure how many miles I'm getting out of a tank (bad for the fuel pump).

But, I'll take it down to about 1/4 tank and fill it up. I've been getting 21-25 MPG. I'm sure I can do better. I need to do a full tune up, including both oxygen sensors.
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