The MPG Post to end all MPG Posts - 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 02-18-2005, 04:05 PM   #11
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Year: 1993
SSE
CAI: No
Other Mods: No

Best Observed Highway: 24
Average Highway: 23

Best Observed City 22
Average City 20
_________________________________
After CAI install

Best observed highway (after two weeks): 26.9
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Old 02-21-2005, 06:47 PM   #12
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year: 1995
model: Bonniville SE
engine: L36
CAI?: No
Other Mods?:None

Best Observed HW MPG: 30 MPG @95mph
Average Observed MPG: 26 MPG

Best Observed City MPG: 22 MPG
Average Observed City MPG 20 MPG
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Old 02-21-2005, 09:53 PM   #13
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year: 1990
model: SSE
engine: ?
CAI?: No
Other Mods?:None

Best Observed HW MPG: 28mpg
Average Observed MPG: 26mpg

Best Observed City MPG: 20mpg
Average Observed City MPG 16 MPG

3.33 final drive ratio. <gx3>


Out of place yes, but oh well.
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Old 02-22-2005, 09:00 AM   #14
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YEAR: 1993
MODEL: SSEi
ENGINE: 3800 Series 1 L67
CAI: no
OTHER MODS: no

Best Hwy MPG: 21
Hwy MPG AVG: 18

Best City MPG: 14
City MPG AVG: 13
Worst City MPG: 12.4
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Old 02-22-2005, 09:08 AM   #15
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Default mileage

year: 1996
model: SE
engine: L36
CAI?: Yes
Other Mods?:No

Best Observed HW MPG: 29 MPG
Average Observed MPG: 27 MPG

Best Observed City MPG: 18 MPG
Average Observed City MPG 15 MPG

Seems I need a Magnaflow cat?
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Old 02-22-2005, 06:28 PM   #16
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year: 1996
model: SE
engine: L36
CAI?: Yes
Other Mods?:No

Best Observed MPG: 30 MPG
Average MPG: 21MPG

i drive on both highways and in the city, so i dont really know how id calculate the mileage for each separately??
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Old 04-15-2005, 11:50 PM   #17
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Low 14 miles per
High 32

Average 27

I actually keep track every fill up
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Old 04-15-2005, 11:57 PM   #18
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Year: 1993
Model: SSEi
L67 Supercharged
CAI: No
Mods: Flowmaster 80 Series, new plugs, new resonator, MSD Coils/wires

Best Highway [email protected] 65
Average Hwy 30

Town 16-20
Average 18
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Old 05-03-2005, 12:04 AM   #19
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Default Re: The MPG Post to end all MPG Posts

i just checked mine for the first time tonight. i bought my car exactly a week ago, so i've only been able to test city/MPG once now. i'm taking the SSE to Colorado tomarrow and will test highway/MPG then. btw, i deliver pizza in this car fwiw...i don't drive crazy but i am in a hurry most of the time. meanwhile, here'* what i got:

year: 1994
model: Bonneville SSE
engine: L27
CAI?: No
Other Mods?: No, completely stock with 104,000 milles

Best Observed HW MPG: not yet tested...
Average Observed HW MPG: not yet tested...

Best Observed City MPG: 21.1 MPG
Average Observed City MPG: 21.1 MPG

i'm happy with that; my 3.1 MPFI 5-speed Cutlass only managaed 18-19 MPG/city (when it was NA) and my Turbo GTS is around 21-22 MPG/city and i need to try to stay out of boost to achieve those numbers. that'* not too bad considering this SSE has a bigger engine and the car is quite a bit heavier.

yeah....i deliver pizza in style
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Old 05-03-2005, 12:38 AM   #20
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Well not sure what l27 and l67 stand for but
best Highway 28 for one tank
avegae highway 26.5
worst highear 14 mpg(many many thing wrong)

city about best 21
city aveage 18
city worst 5 mpg(many many thing wrong)

The aveage I get most of the time is 23-24mpg I drive 60% highway 40% city
the worst highyway mileage
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