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Old Aug 31, 2005 | 06:41 PM
  #1  
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Default Mpg

Was wondering what everyone gets for MPG with there cars. Last weekend I drove to Carlisle. A 3 hr trip. I got 18mpg highway. Thought it could have been better. Car is a 78 all stock includeing the original cat. I plan on installing a true duel set up with 2.25 pipes and mabey a fuelinjection set up.
Thanks Mike S
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Old Aug 31, 2005 | 06:50 PM
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St. Jude Donor '04 & '05
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My 75 usually gets 15-16 on the highway, give or take. Of course the carb is all messed up right now and needs a rebuild. However in a few weeks Lars should resolve that during the NJ leg of the Tuning For Beer Tour.

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Old Aug 31, 2005 | 06:56 PM
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20+ with overdrive and original 2-1-2 '75 exhaust
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Old Aug 31, 2005 | 07:00 PM
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8-10 city in my 69
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Old Aug 31, 2005 | 07:25 PM
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20.7 mpg highway with EFI 454 and 5-speed. Very important these days.
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Old Aug 31, 2005 | 07:32 PM
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23 with overdrive and true duals. I guess those 2.87 gears have to be good for SOMETHING.

Don't ask about in town though
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Old Aug 31, 2005 | 07:35 PM
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13 mpg highway on my '73 454 4-speed

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Old Aug 31, 2005 | 07:38 PM
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1970 350 Auto - Stock
18 - 19mpg Highway - but that was without the kickdown working...I since have fixed the problem.....so I dont think I will get that mileage again!!
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Old Aug 31, 2005 | 07:56 PM
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no matter where i got i come back with half a tank.... weird.
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Old Aug 31, 2005 | 08:42 PM
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5 hour trip to Carlisle, 18 mpg. Almost stock 81, converter removed, 3.31 rear. Cruised about 70-75 on the way down.
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Old Aug 31, 2005 | 09:36 PM
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19.7 on the highway with an 850 double pumper and richmond six speed.
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Old Aug 31, 2005 | 10:42 PM
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With the ridiculous price gas I'm considering throwing the 3.08's back in it.
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Old Aug 31, 2005 | 10:52 PM
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I running 456 gears, and a shift kit, gas mileage is great in the driveway But once I'm one the highway 10 tops, those 456's are garage wall decorations, this winter going to maybe 355's or all the way back to the 308's.
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Old Aug 31, 2005 | 10:55 PM
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Zero..

mine hasnt moved since gas got over 2.50 a gallon..

that and the fact it was missing an engine
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Old Sep 1, 2005 | 12:02 AM
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Hmm. Well, I was averaging about 10-12 mpg with the old LS-5, 3.70 gears, 4-spd, and 750 Q-jet. On the highway it would get almost 15 mpg. Now, that the car has a 496 Stroker, 3.70 gears, Tremec 5-spd, and 850 DP Demon, I have been getting about 6 mpg. Of course, that might have something to do with the fact that I can't seem to keep my foot out of it lately.....
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Old Sep 1, 2005 | 12:12 AM
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It sucks about the rising gas prices....but thats not stopping me from enjoying my vette....The feeling of being in my vette cruising and having a good time......its priceless! (or $1.35 a litre!!) - but thats in AU$ and for premium unleaded.

Last edited by cosmicvette; Sep 1, 2005 at 12:18 AM.
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Old Sep 1, 2005 | 12:43 AM
  #17  
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I was getting 8mpg a couple of weeks ago... but since then I've pulled off a cat and timed it to 38 degrees advance so it's gone up for sure
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Old Sep 1, 2005 | 02:26 AM
  #18  
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9in the city and 11 on the highway...... i need to find out how to help my little 76 do better

at least there is one good thing about being in Nebraska with my car back in CA...... get to save on gas money


Billy
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Old Sep 1, 2005 | 05:13 AM
  #19  
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Stock 1980 350cu 16.5 mpg
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Old Sep 1, 2005 | 10:17 AM
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I used to get 16-17 but now it's down around 13-14. As the rings go out and this bottom end gets ready to die, efficiency is going out the window.
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