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.
View Poll Results: Your Gas mileage?
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What's your gas mileage?

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Old Sep 23, 2005 | 11:27 AM
  #11  
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I'm representing the 20 MPG of mixed driving. About 6.5 HWY and 3.5 CITY one way on average.

But keep in mind I have sticky brake calipers....so that can't help. Brake shop just doesn't seem capeable of fixing them...
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Old Sep 23, 2005 | 01:08 PM
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jrs we aready has a post similar to this
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Old Sep 23, 2005 | 01:37 PM
  #14  
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Default Gas mileage spreadsheet thoughts

Originally Posted by jr's3800
Charlie Bonn, how about we get more detailed... I like the idea of this spred sheet...

In detailed I'm think we have a series of diffrent cars here that all sport the 3800 powerplant... we should get an idea of what all of these cars will do as for effiency, and from there we may be able to get a good average.. I think it should be listed as so..

Year

Make - ( Pontiac, Buick, Olds )

Model - Bonneville, Bonneville LE, SE, SLE, SLE SC, SSE, SSE SC, SSEi .... Or buick olds or what have you...

Engine - LG3( vin 3 ), LN3( vin c ),L27( vin L ),L67( Vin 1, 92-95 ), L67( Vin 1 96-03 )

Trans/Gear ratio - (4T60- 440-T4 ) 4T60-E or 4T65-E / 2.84,2.85,2.93,2.97,3.06, 3.33 etc etc )

Highway Milage -- MPG @ -- Mph

City Milage --MPG

Something like that as all of these will in some way make a diffrence in overall milage...

Any thoughts?
Agreed, .... JR'* 3800...!

Problem is .....how to get the data from people.
Alot of folks won't know all the info.
Some may be mistaken, or enter it incorrectly.

It'* difficult, and time consuming to extract data from an post filled with conversation
(was that 3.8 his low mileage or engine size?)
Yes the responses would have to be just for this topic, without extraneous comment

We could ask for their VIN without the last six digits.... and interpolate it ourselves,
But that'* a strategic nightmare of manhours....
Who typed in a J when they thought they typed K.... Or the letter O for a zero, or an I for a one.....

Just off the top of my head, I think the best way might be to set up a database form where data could be entered in a specific format... such as the VIN
( where if the digit is a number, the form wouldn't accept a letter,
and vice versa) and what was "unknown" ( i.e. left blank) wouldn't be calculated.

But that, gets away from a simple spreadsheet idea.

I was thinking of just a Bonneville spreadsheet, but It wouldn't be difficult to make one for the Buicks, and Olds' too, and then average the three on a separate sheet

I'll give it some more thought,
Anyone caring to add their $.02 is welcome to brainstorm.
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Old Sep 23, 2005 | 01:44 PM
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Seems like A LOT of work for data that we already know the answer to...
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Old Sep 23, 2005 | 01:53 PM
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I hardly ever drive on the highway for more than 10 miles at a time. I beat on the car to my heart'* content, have plenty of mods with a stall torque and 3.29 gears.

I drive the car about 8,000 miles a year in total, much of the time I'm sure I don't get more than 10 or 12 MPG :P .

If you want to take all of this a bit further too, I think I'll be lucky to do 20,000 miles on the brakes and the rotors have been beaten beyond the point where they should be anything approximating straight.

Tires will last me about 16,000 miles.

I have changed my oil 8 times in the last 2,500 miles.

I have replaced the rear passenger Monroe strut 3 times in the past 16 months.

Good thing my car is only a hobby :P :?

Cheers,
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Old Sep 23, 2005 | 04:22 PM
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I've seen as high as 35 MPG

as low as 10 MPG.

My drive to work is 2 miles stop and go and 8 miles freeway

I average about 27 MPG
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Old Sep 23, 2005 | 04:59 PM
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no lie i filled up two days ago and only needed 2 gallons, and the trip odometer only said 101mi. thats 50.5 MPG!!!1

lowest ive seen is 17 or so, regular highest is 21.
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Old Sep 23, 2005 | 05:09 PM
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I've been keeping a spreasheet and tracking my MPG that way, ill post it when I get home.
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Old Sep 25, 2005 | 01:20 PM
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well i have seen 13 mpg for the last 2 tanks but that was running mid grade and that is only 87 here in colorado bumped up to perumiuem this tank to see what i get new delco o2 and plugs 180 t stat aswell as a new pcv and all my driving has ben in town 10 miles 1 way to work and some fun runs mixed in i think i need to pop the T.B. off and do a good clean on it
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