C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Oct 29, 2012 | 11:59 PM
  #21  
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Originally Posted by cuisinartvette
On an aging car you may still get what was est new poss. a little less

How guys are outsmarting the engineers and claiming another 4-5 mpg I will never figure out.

Please tell us these secrets

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Old Oct 30, 2012 | 12:09 AM
  #22  
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Gauge is currently resting at 18.7 MPG, however that's dating all the way back to May when I reset it. It had to put up with me learning how to drive stick after that before getting to where it is now.

Watching the instantaneous MPG meter, I get around 32 on the highways doing 70 MPH, 22 around town driving like a grandma. Econoboxes indeed...
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Old Nov 1, 2012 | 12:04 PM
  #23  
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Originally Posted by cuisinartvette
On an aging car you may still get what was est new poss. a little less

How guys are outsmarting the engineers and claiming another 4-5 mpg I will never figure out.

Please tell us these secrets

No secrets...and no outsmarting the engineers involved, either.

The Corvette, to my knowledge, was never advertised as an 'economy' car though it does achieve great gas mileage when maintained and driven properly...as I stated in an earlier post my Vette gets better mileage on the highway than my HHR ever thought about doing...think torque, gearing, and aerodynamics - not just brute HP.

BTW, my '94 auto gets 28, 29 MPG on the same routes I drive in the '96.
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Old Nov 1, 2012 | 03:45 PM
  #24  
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Originally Posted by cuisinartvette
On an aging car you may still get what was est new poss. a little less

How guys are outsmarting the engineers and claiming another 4-5 mpg I will never figure out.

Please tell us these secrets

That's why i started this
Would like to see if anyone has any tips and tricks. As it stands my stock LT1 gets an average MPG of 21 with my weekly work, errands and wherever else i go during the week.
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Old Nov 12, 2012 | 10:57 PM
  #25  
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Because the "imagineers" are busy making graphs like that one
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Old Nov 12, 2012 | 11:52 PM
  #26  
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Originally Posted by Kid96
That's why i started this
Would like to see if anyone has any tips and tricks.
No secrets here. Keep the car in good tune, keep the RPM low, look ahead...drive with common sense. I get fantastic numbers with ALL my vehicles. Click on the 'Vette for more details on that particular cars consumption, right here: TOM"S VEHICLES' CONSUMPTION

http://www.fuelly.com/driver/tom400cfi

-Tom

Last edited by Tom400CFI; Nov 13, 2012 at 12:10 PM.
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Old Nov 13, 2012 | 09:22 AM
  #27  
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Use cruise control.
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Old Nov 13, 2012 | 11:14 AM
  #28  
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Yeah yeah, I know the fuel gauge isn't 100% accurate. But I've averaged about 32 on a trip to the beach at a constant 55mph. The gauge is just a ballpark number, but 32mpg is the best I've ever gotten (Miles divided by gallons to fill up).

I average about 20-22mpg around town or normal driving.
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Old Nov 13, 2012 | 12:08 PM
  #29  
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Originally Posted by Chuck Tribolet
Use cruise control.
Only if you're a terrible driver. A good (smooth, looking ahead) driver can beat Cruise Control MPG every time.

Here I am finishing a road trip from Telluride, to SLC, UT.

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Old Nov 13, 2012 | 02:55 PM
  #30  
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Originally Posted by Tom400CFI
Only if you're a terrible driver. A good (smooth, looking ahead) driver can beat Cruise Control MPG every time.

Here I am finishing a road trip from Telluride, to SLC, UT.

Cruise control makes you look ahead. I average about 27 MPG in my '87
Morgan Hilll CA to Tucson, including the city streets on each end and
a 2000+' altitude gain and the pre-Christmas traffic and Pacheco and
Grapefine passes, and LA freeways.


Chuck
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Old Nov 13, 2012 | 03:14 PM
  #31  
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Cruise also throttles the engine way more than necessary to maintain a constant speed. You can do better, manually. I can, anyway. You'll see that my average is better than 27. NOTE that is an average of ALL my driving; trips, errands, track days, sitting in traffic, everything. Not an average on a road trip. See it HERE. Anyway, on a road trip, I can average over 30 mpg easy, at 75-80 mph w/o using cruise. If I set the cruise, the average goes down.

However if you're a throttle jockey....a "peddle pumper", I.E. you can't drive at a constant speed (and many can't), the CC will help.

Last edited by Tom400CFI; Nov 13, 2012 at 03:22 PM.
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Old Nov 13, 2012 | 04:08 PM
  #32  
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Originally Posted by 383vett
You are obviously either a mathmatician or crazy.
Originally Posted by 3D87C4
Both...an engineer.
Me too.

Originally Posted by SeanHM
Because the "imagineers" are busy making graphs like that one
It is not imagineering. Good engineers take data and evaluate it to learn and make changes and evaluate it again to confirm if the changes worked. This is similar to a before and after dyno runs or quarter mile runs, etc.

I like to see data like this. By the trend lines you can draw a conclusion that the mpg's do better in the warmer months. On my '94 it would be about 2 or 3 mpg better in the summer too. If there is more detail of driving for each data point, you may see some things show up on the outliers, such as a highway trip might be a high point, etc.

My '94 M6 averaged about 28.5 in the summer and about 26 in the winter. My 100 mile per day commute was nearly all highway so it was heavily biased towards highway cruise mileage.

Love the graphs.
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Old Nov 13, 2012 | 04:27 PM
  #33  
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But you gotta admit, it's a bit nerdly.
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