Generation III Internal Engine 1997-2006 LS1 | LS6
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View Poll Results: whats your MPG
27-31
55
25.94%
20-26
81
38.21%
12-20
76
35.85%
Voters: 212. You may not vote on this poll

How many getting close to 31MpG

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Old Mar 18, 2008 | 07:20 PM
  #101  
joblo1978's Avatar
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From: Colorado Springs
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With mods in sig, at 80mph, constant, relatively flat, yes.
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Old Mar 18, 2008 | 08:44 PM
  #102  
ToplessZ's Avatar
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From: Cedar Rapids,IA
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The numbers I posted on the first page I got on a trip from Iowa to Indiana. The car was bone stock down to the air cleaner. All Interstate, 75-85mph all the way. No stop and go traffic. Just a fairly constant speed with the cruise on. Checked it twice on the way. First time I got 28 mpg. Couldn't believe it. Checked at the next fill, 30mpg. You don't need to be no math genius to figure it out. You aren't going to get that mileage with anything but a constant highway speed with little to no stops. And I would be more than willing to take that stupid little bet if my car was still stock.
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Old Mar 18, 2008 | 11:21 PM
  #103  
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From: CT/AL
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I have gotten 25.5, 26 and 26.9 hand calculated on trips through the flat parts of Florida and Alabama, tops off, windows down, averaging 80mph. It seems with the headers, exhaust, and cam, 80-85mph is the sweet spot between engine efficiency and drag. Any slower, the engine is too low of an rpm, any faster and drag takes its toll (and I get nervous about cops!)
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