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Average MPG in rural America?

Forum: C4 General Discussion

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Average MPG in rural America?

Posted: 5/15/14 7:16amMessage 1 of 18
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Mountaineer
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Gay, WV - USA
Joined: 4/14/2013
Posts: 11
Vette(s): !989 Medium blue convertible
I have had my 1989 convertible for well over a year,and it's been trouble free,In fact I drive it so much that I had to upgrade to the freedom option on my collector car insurance because I put a lot of miles on it.
I see post where people state average MPG as 25-27 miles per gallon,but I get 19 average off interstate,and 21-23 on interstate 77.
The car seems to run perfect,and if I look at instant fuel rate on flat straight ground it does read 27-28 ,but on steep hills it reads 11-12 .Like I say the car runs great,and it takes very little throttle to maintain a steady speed.
I live in somewhat hilly terrain and was wondering what kind of mileage others are getting in such conditions.My car is a l98 auto 2.59 that is practically stock .Thanks
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Re: Average MPG in rural America?

Posted: 5/15/14 9:29amMessage 2 of 18
c
cco
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Posts: 191

Mine is about 25mpg's on the hwy and about 20 in town. I'm happy with that and she runs like a top.

C.

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Re: Average MPG in rural America?

Posted: 5/15/14 4:02pmMessage 3 of 18
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hcbph
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Minneapolis, MN - USA
Joined: 8/16/2013
Posts: 53
Vette(s): Purchased a 1986 Convert August 2013, Bright Red color with a black top, it'd already received a Tremec 5 speed upgrade along with a disc upgrade prior to purchase.

The only real distance driving I've done so far is when I bought it (1300 miles).

I got best of 32 mpg out of it on the highway at 75 driving from N.M. to Mn.

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Re: Average MPG in rural America?

Posted: 5/16/14 5:12pmMessage 4 of 18
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Mountaineer
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Gay, WV - USA
Joined: 4/14/2013
Posts: 11
Vette(s): !989 Medium blue convertible
It may be due to the fact that it's an automatic,but It doesn't get such poor mileage that it prevents me from driving it ,but it would be nice if it got what everyone else seems to get.Premium is nearly $4.oo per gallon here,and it seem that ALL gas around here has that ethanol in it.
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Re: Average MPG in rural America?

Posted: 5/17/14 4:24amMessage 5 of 18
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hcbph
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Minneapolis, MN - USA
Joined: 8/16/2013
Posts: 53
Vette(s): Purchased a 1986 Convert August 2013, Bright Red color with a black top, it'd already received a Tremec 5 speed upgrade along with a disc upgrade prior to purchase.

Question - why are you putting premium in your Vette?  If you have the L98 as you said, it's unmodified then it should have 9.5-1 compression ratio.  That should run on 87 octane regular just fine.  You're not getting any benefit by running premium and actually may be hurting things because you want higher compression or something like a blower to take advantages of the characteristics of premium.

I admit that gasohol is hard on rubber parts but even if you have to fuel with non-alcohol gas for collector cars and small engines, it's still cheaper here than paying for premium. Having said all that, with a 2.59 gear ratio, I would expect yours to do very well on the highway using cruise.  Now all this depends also on driving style, if you're a stoplight racer it will kill gas mileage every time.

Mine has the same compression ratio and I've been burning 87 octane in it since I bought it last year except when I put it into winter storage last fall.  Then I used non-alcohol gas.  It drives just fine on 10-15% gasohol.

Just my 2 cents.



|UPDATED|5/17/2014 4:24:03 AM (AZT)|/UPDATED|
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Re: Average MPG in rural America?

Posted: 6/14/14 5:57amMessage 6 of 18
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We Gone
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Joined: 11/1/2013
Posts: 32
Vette(s): 1982 CE, also own 96 CE LT4, 91 ZR-1, 95 LT1, 2004 coupe
Both my 91 & 93 ZR-1s get about 17-19 around town and 24-26 on the interstate.

|UPDATED|6/14/2014 5:57:46 AM (AZT)|/UPDATED|
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Re: Average MPG in rural America?

Posted: 6/15/14 9:20amMessage 7 of 18
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djsroknrol
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Guthrie, OK - USA
Joined: 2/7/2011
Posts: 124
Vette(s): 1984 L83/MD8 coupe
I've been getting around 16 - 19 in town and 19 - 23 on the highway. I'm convinced that the TB's are slightly off and I'm running on the rich side...my oldest son and his daughter are spending Fathers Day with us so I talked him into helping me check the base and balance out while they're visiting Wink
Remember, there's no place like ~ ;)
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Re: Average MPG in rural America?

Posted: 6/18/14 9:19amMessage 8 of 18
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mickvette-C4
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, United Kingdom
Joined: 5/12/2014
Posts: 2
Vette(s): 1995 LT1 C4, Competition Yellow
Mountaineer said: It may be due to the fact that it's an automatic,but It doesn't get such poor mileage that it prevents me from driving it ,but it would be nice if it got what everyone else seems to get.Premium is nearly $4.oo per gallon here,and it seem that ALL gas around here has that ethanol in it.

$4 a gallon, I wish Shocked. Here in the UK we pay (after converting £ to $) around $9 Cry, but I still rack up the mileage, guess we just love been scalped over here!

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Re: Average MPG in rural America?

Posted: 6/19/14 5:55amMessage 9 of 18
k
kjcoff
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Prospect, TN - USA
Joined: 9/6/2013
Posts: 12
Vette(s): 94 LT-1
Mountaineer, I'm in the backwoods of TN. My '94 is getting between 21-22 mpg going to and from town and right at 25 mpg when I head to the big city to say, watch the Titans fall in glorious defeat to any other team in the NFL! Here's a gas link I use when I'm out on the scooter to find the best gas available: http://pure-gas.org/extensions/map.html

|UPDATED|6/19/2014 5:55:05 AM (AZT)|/UPDATED|
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Re: Average MPG in rural America?

Posted: 6/19/14 9:06amMessage 10 of 18
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Mountaineer
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Gay, WV - USA
Joined: 4/14/2013
Posts: 11
Vette(s): !989 Medium blue convertible
My gas mileage has gotten a little better since I've switched gas stations.The man that I got the car from said that he only used BP,or Exon ,so that's all I ever ran,but one day the cashier at Krogers doubled my fuel savings points,and I decided to use them to fill the Vette up,and I gained about a mile per gallon on both the interstate,and the secondary roads.That's what I've been running lately,and it runs just fine.I don't even know what brand of gas it is,but I'm thinking it may have less additives,and more actual fuel per gallon,but that's just a guess. I have also discovered that running with the top down on the interstate cost me about a mile per gallon.
The reason that I use premium is that I figure the computer will turn down the timing if I use lower octain,and make it less efficient .I might be wrong about this assumption though.
I also would like to ask any of you that have gotten rid of your catalitic convertors ,but have kept your factory manifolds if you notice any difference on mileage,or power .My car is basicaly stock with the execption of flowmasters,and de-screening,and opening the air box.


|UPDATED|6/19/2014 9:06:28 AM (AZT)|/UPDATED|
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