Miles per tank - 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 04-06-2004, 01:39 AM   #1
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Default Miles per tank

How many miles per tank of gas do you all average, with your 3800-II engines? I'm still trying to adjust to the mpg reduction from my old car to my Bonny. Believe me, I'm not complaining... a few less miles per tank is worth the price of driving my SLE every day!
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Old 04-06-2004, 01:41 AM   #2
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I generally get just over 300 miles before I get to fill-up point (just over a quarter). Liable to go down now that spring is trying to get here and the roads are dry.
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Old 04-06-2004, 09:39 AM   #3
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Generally I get 15 -17 mpg around town. 5-7 mile trips.
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Old 04-06-2004, 02:47 PM   #4
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no idea in MPG or KMPG either.. I get about 600+ KM a tank.. that'* when it'* down to 1/8th.. don't like pushing further then that
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Old 04-06-2004, 02:49 PM   #5
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I get about 320 before it hits the orange. That is city driving. On my work trips to philly I could get about 440 before the orange.

Jay
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Old 04-06-2004, 06:08 PM   #6
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400 miles on the highway................under 300 day to day
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Old 04-06-2004, 06:34 PM   #7
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I get almost 500km on a tank with about 60 percent highway driving. I remember a time that I could get almost 750km (total highway) on a tank. Ohh, those were the days!
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Old 04-06-2004, 07:27 PM   #8
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I am getting around 350 Km on full tank, just city driving no highway. All i have done so far is got new spark blags (bosh paltinum), fuel filter, air filter and thats pretty much it. What else could I do to increase my Mpg? Also where can i get the O2 sensor?
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Old 04-06-2004, 08:53 PM   #9
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How do you people get so good of mpg with your SSEi'*? The best I've ever gotten was 26 mpg. The last month it'* down to 13 mpg. 240 miles max and I put in 17.9 gallons.
I don't do a lot of in town driving, maybe 40 miles out of the 240 miles. I try to baby it and it still doesn't get over 250 miles and if I'm luck 260. My parents have had two Park Avenue Ultra'* (both Series 1 SC'ed) and the best they have ever gotten was 25 mpg on a trip to the Grand Canyon, but generally in the 20-22 mpg range. My sister has a 1995 Riviera (Series 1 SC'ed) and the best she ever got was 22 mpg. My cousin has a 1996 Riviera (Series II SC'ed) which he totally babies and on a trip to Milwaukee he got 27 mpg, otherwise he gets 22-23 mpg. My friend'* (he doesn't baby his) 1995 SLE and he gets 17-19 mpg on 89 octane.
All of us put the majority of the miles on out of town (we all commute 15-35 miles one way to work except my parents -mom'* been semi-retired since she had her third kid in 1970 and dad drives his 1990 Olds 98 for work 23-26 mpg).

The 3800 car that got the most consistant mpg that I am familiar with was my dad'* old 1989 Lesabre Limited. It didn't matter how hard, how long, or how often I put my foot into it, or how much city driving there was -it never failed to get below 27 mpg. The majority of the time it would get 30-32 mpg and on a pure highway trip would put out as much as 35-36 mpg. That is one 3800 car I wish I had now with the prices we're paying for gas. My sister and her husband have the car now with over 240,000 miles and last week my sister commented that she just got 32 mpg -made me want to cry.
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Old 04-06-2004, 10:18 PM   #10
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Quote:
Originally Posted by jr's3800
He he he..... On my 91 bonneville 3800 I was doind some serious foot planting for 60 miles or so and still managed 31 mpg.... I did nothing under 80 mph for the 130+ miles up and back for a totall of 260 miles.... Filled up untill I dribbled fuel and the math ran out to 31 mpg.... I have often wondered what it would have been if I didn't plant my foot so much on that trip...
I know what ya mean, jr. On my last trip to your fair state, I went from Sanford to Miami using 8 gallons of gas over 250 miles. I pinned the speedo at 85mph for a very short time but I averaged about 75mph for the bulk of the trip. And I had the wife and kid with me, plus the trunk was packed to the gills with stuff. Who woulda thunk we're driving an "economy car"!
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