Your Mileage May Vary

[tf95ZR1]

I saw 8CAM's 44444 pic and I focused on the
Average 16.2 MPG. Mine is also in that range
with both city and highway driving. What do you
get?

[Performawheels]

I'm almost all city and average 13-14.5. On the last highway trip I was around 17...


Sent from my iPhone using ZR-1 Net Registry (https://siteowners.tapatalk.com/byo/displayAndDownloadByoApp?rid=90383)

[We Gone]

If I just run the interstate 24-26

16-18 around town is about right.

[8cam]

Yep that's about right, lots of city driving and it runs around 17mpg. Out on the highway and I've gotten as much as 28mpg on a road trip. That pic was 2.5 years ago and since then I've replaced coils, wires, plugs, fixed vacuum leaks, and done a ton of other changes/fixes. When I first got the car I couldn't get more than about 24mpg on a road trip. With all the work I've done, my road trip mileage has gone up 3-4mpg, while my city mileage has improved maybe 1mpg.

[PhillipsLT5]

Aprox 15 in city, but 22 on hiway even with 4.10's

[Vetman]

I drove my well sorted out stock 1990 z to the May gathering 2015. Traveled 4987 miles and averaged 25.6 mpg from Washington state to Bowling Green to Chicago (Marc's shop) back home to Yakima Washington. AC on part of the trip.

[Billy Mild]

23-24 mpg highway. If it's city mix then 17-18 mpg. Sometimes it is hard to keep the foot out of it

Sent from my Nexus 6 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[Paul Workman]

If I just run the interstate 24-26

16-18 around town is about right.

Yep! Same here. 432 rwhp (that's 508 ish at the FW) and best mileage of any vehicle in the bunch!

NOTE: I never really went by the mpg read-out. Mine was done the old fashioned way: gallons/mileage calculation by hand.

[Racinfan83]

Same here. My avg reads 19.2 right now. But I've probably only driven 60 miles around here since a 400 mile trip to Paducah last fall for a show. But I would say that 19 is pretty average for it. 25-26 hwy at 75-80 mph..

[Kevin]

I'm almost all city and average 13-14.5. On the last highway trip I was around 17...


Sent from my iPhone using ZR-1 Net Registry (https://siteowners.tapatalk.com/byo/displayAndDownloadByoApp?rid=90383)

17 on the highway? my last trip home from carlise was almost 30mpg

[efnfast]

Best I ever had on a long trip (less than 150 miles) was 29.6. My overall average is about 22.

[Dime]

I can get 26-27 on the highway if I really try. Around town? Couldn't tell ya, usually when I'm having fun so the average drops like a rock.

[rush91]

Just put mine up for the weekend :( Nothing but rain forecast for the next 3 days.... but drove it everyday this week to work. Averaged 15.9 around town ( still have stock chip w/ 1-4 shift ) but once I get on the highway, I get 26, if not close to 27 MPG.

[FU]

Around town short spurts 9-10 open road 22-24mpg

[mike100]

I only take the car out when I want to play so it probably is doing 13 mpg. Every now and then I drive down to San Diego proper and it gets a 60 mi round trip which brings the mileage up to what you would expect. It still gets 24-25 mpg on the road.

One observation is that my C6 always gets better mpg like 1-2 mpg more for each comparable situation or drive type. I would venture the weight difference and less loss in the drivetrain.

[Mystic ZR-1]

Put the dashboard mpg readout in "instant"
then nail it in 1st gear and see what ya get!
So much for good gas mileage...
On the other hand, go 100 in 6th then drop it into
neutral and coast!

[BigJohn]

Put the dashboard mpg readout in "instant"
then nail it in 1st gear and see what ya get!
So much for good gas mileage...
On the other hand, go 100 in 6th then drop it into
neutral and coast!

You can get to 100 mph?

[GOLDCYLON]

Regardless folks lets all remember this was the first Corvette to not receive the Gas Guzzler Tax.

And the car is still a blast to drive.

[Jagdpanzer]

When driving long distance I know my Z has a longer range than my bladder. If I keep my foot under control it'll do 25 mpg or a little better.

[Mystic ZR-1]

You can get to 100 mph?

In 1st gear!
You're forgetting the car is RED

[BigJohn]

In 1st gear!
You're forgetting the car is RED

But you said you were at 100 mph in sixth year!
:confused:

[Mystic ZR-1]

I can go 100 in 1st as well as 6th!
The gas mileage at 100 in 1st ain't too good though!
That's approx 14000+ RPM!

[BigJohn]

I can go 100 in 1st as well as 6th!
The gas mileage at 100 in 1st ain't too good though!

Yeah I got that same problem!
:(

[PhillipsLT5]

Regardless folks lets all remember this was the first Corvette to not receive the Gas Guzzler Tax.

And the car is still a blast to drive.

No tax = valet key(bimodel), (EPA Smoke & Mirrors), blast to drive, yep for sure must be at least 10yrs of permagrin now, I got my $ worth, resale no problem, drive em, have fun, not a piece of garage furniture

[BigJohn]

No tax = valet key(bimodel), (EPA Smoke & Mirrors), blast to drive, yep for sure must be at least 10yrs of permagrin now, I got my $ worth, resale no problem, drive em, have fun, not a piece of garage furniture

The truth is; it is the skip shift that beat the gas guzzler tax.
[-X

[Racinfan83]

Yeah that thing we all get rid of...=D>:cheers:

[garyhugo]

15-16 mpg around town with 4.10s. 21-22mpg on the hwy at 75-85 mph. 444 CHP.

[BlackSheepz]

Normally when it's all said and done from tank to tank I hover between 17-19.

I literally just got done driving from Marc Haibeck's shop to Indianapolis and got 27.4 though. (Old school math, not trip computer math). :fahne:

[Vetman]

As I remember several years ago I set cruise at 103 in sixth on level road and and the instant mpg said 20.5.

I have also done the math on paper and pencil and found the average mpg on the computer within a half mpg of being correct.

[Vetman]

My 2011 Cadillac CTS-v 6 speed manual gets best of 21 hiway. But it is turning 1800 rpm at 60 and my z is turning only 1400. Cadillac weighs 700 more pounds and pushes more air too!

[We Gone]

http://imagizer.imageshack.us/v2/800x600q90/923/3RNxan.jpg

[Mystic ZR-1]

I've found my dashboard display to be consistantly
off by about 10% (low) vs the "old way".

[BigJohn]

I've found my dashboard display to be consistantly
off by about 10% (low) vs the "old way".

So you do remember "Old Way"!
:cheers:

[GOLDCYLON]

[-XThe truth is; it is the skip shift that beat the gas guzzler tax.
[-X

Not accurate even the base c4 had skip shift. The base C4 did not beat the Gas Guzzler Tax....the LT5 did.[-X

[GOLDCYLON]

http://imagizer.imageshack.us/v2/800x600q90/923/3RNxan.jpg

Your doing that wrong Steve it should be 180 ;)

[BigJohn]

[-X

Not accurate even the base c4 had skip shift. The base C4 did not beat the Gas Guzzler Tax....the LT5 did.[-X

That is interesting my base C4's didn't have the gas guzzler tax!
:confused:

[GOLDCYLON]

That is interesting my base C4's didn't have the gas guzzler tax!
:confused:

Read the Heart of the Beast. All C4s did with the exception of the ZR-1. It was the ONLY C4 to beat it.

Here is quote from the Vice President of GM, Bob Schultz page 45

"Well, if the L98 can't beat gas guzzler, what chance has LT5 got? "It meets it" Roy piped up. you're telling me we've got a 245 hp engine that can't [questioned Schulz] " the answer is obvious, isn't it? Give the L98 to Lotus and let them fix it!"

While 1to4 was piece of the puzzle low idle speed and the calibration were key factors as well.

The 405 hp model, surpassed the gas guzzler threshold of 22.5 mpg by a comfortable margin, achieving 23.1 on the EPA scale. HC, CO and NOx emission were also reduced. This info is on page 75.

[aafc]

1990 white/black #2546 4-speed 4l80E trans with 3.73 rear gears. My mileage
16-19 avg, but some times i get 20-21 on a long trip. But I get mid 11.78 to 11.84 in this hot Fl. summer. If I set my mileage to inst at the track i get 3-4
miles per gallon. So i do not use that setting ,in avg setting it will drop down to 13-14 mpg, if i start with 16 mpg.
John

[BigJohn]

Read the Heart of the Beast. All C4s did with the exception of the ZR-1. It was the ONLY C4 to beat it.

Like on the Internet don't believe everything you read!
My 93, 95, 96, 98 and 06 Corvettes plus my 95, 96 Camaros and 96 Roadmaster beat the gas guzzler tax!

[GOLDCYLON]

Like on the Internet don't believe everything you read!
My 93, 95, 96, 98 and 06 Corvettes plus my 95, 96 Camaros and 96 Roadmaster beat the gas guzzler tax!

I provided the proof from the Heart of the Beast by Anthony Young. I suggest you buy a copy and read it. It gives a lot if history about the LT5 program. I didn't relate something that somebodies cousins sisters brother posted to the Internet like you imply with this post.

Roadmasters and Camaros are an apple to oranges argument. The base C4 did not meet the EPAs threshold.

[Corvettes White]

I recall it was for the forthcoming regulations they comparing. Not the then current ones. GM had a policy of not making cars that would be subject to the tax. The skip shift, and the earlier Doug Nash with automatic overdrive helped get the cars over the target. Also the manger was goatting the engineering teams. As a result the LSX motors that showed up in '97.

[8cam]

I'm surprised by all the low highway numbers. Either we have lots of cars in poor states of tune (doubtful), or you guys need to go for more extended runs. When I head to Florida, the roads are mostly flat and an easy 75-80mph cruise gives me an average right at 26mpg, brought down by a few stop signs near the end - its nearly 28 for most of the trip. Heading up to Bowling Green, the roads are more hills and with just one stop, I get 25mpg overall.

[We Gone]

3.73 effected the 91. I can do 27-28 in the 93 with stock gearing.

[GOLDCYLON]

I lost a few mpg when I pulled the secondaries but those butterflies are not coming back

[Hog]

The only Corvette that I am seeing on the 49 state EPA list is the 1989 Callaway Turbo Vettes. There are only a couple GM vehicles on that list from 1986-1993. The TBI 350 Caprice(police version), Cadillac Allante, Cadillac Broughham and a commercial vehicles.

Of course the Dodge Viper is on that list with its 12mpg/20mpg city/highway ratings

[BigJohn]

The only Corvette that I am seeing on the 49 state EPA list is the 1989 Callaway Turbo Vettes. There are only a couple GM vehicles on that list from 1986-1993. The TBI 350 Caprice(police version), Cadillac Allante, Cadillac Broughham and a commercial vehicles.

Of course the Dodge Viper is on that list with its 12mpg/20mpg city/highway ratings

But Darrell's gold leaf book says not but LT5's!!!

[GOLDCYLON]

But Darrell's gold leaf book says not but LT5's!!!

I said the LT5 was the only C4 corvette to beat the gas guzzlers tax. You are the individual talking about Camaros and the like. I made zero statements about any other vehicles. You and Hog went there. Just like you arrogantly decided I received my information from the Internet

It's in hard print as as stated fact. The gold leaf book as you state is the standard on the LT5 program. However some folks will never believe what they read or see.

[BigJohn]

I said the LT5 was the only C4 corvette to beat the gas guzzlers tax. You are the individual talking about Camaros and the like. I made zero statements about any other vehicles. You and Hog went there. Just like you arrogantly decided I received my information from the Internet

It's in hard print as as stated fact. The gold leaf book as you state is the standard on the LT5 program. However some folks will never believe what they read or see.

Cool beans!
Did you purchase a new C4 in 1989 with gas guzzlers tax?
I did with out having to pay it!

[Vette73]

My 73 with a worked 350 w 3:70 gears and a 4 speed gets no more than ten...

Maybe I should slow down ..Lol...

[Hog]

I said the LT5 was the only C4 corvette to beat the gas guzzlers tax. You are the individual talking about Camaros and the like. I made zero statements about any other vehicles. You and Hog went there. Just like you arrogantly decided I received my information from the Internet

It's in hard print as as stated fact. The gold leaf book as you state is the standard on the LT5 program. However some folks will never believe what they read or see.

There has been some miscommunication.

Big John stated:
"The truth is; it is the skip shift that beat the gas guzzler tax"

Goldcylon countered:
"Not accurate even the base c4 had skip shift. The base C4 did not beat the Gas Guzzler Tax....the LT5 did"

Big John the retorts:
"That is interesting my base C4's didn't have the gas guzzler tax!"

Goldcylon adds:
"Read the Heart of the Beast. All C4s did with the exception of the ZR-1. It was the ONLY C4 to beat it.

Here is quote from the Vice President of GM, Bob Schultz page 45

"Well, if the L98 can't beat gas guzzler, what chance has LT5 got? "It meets it" Roy piped up. you're telling me we've got a 245 hp engine that can't [questioned Schulz] " the answer is obvious, isn't it? Give the L98 to Lotus and let them fix it!"

While 1to4 was piece of the puzzle low idle speed and the calibration were key factors as well.

The 405 hp model, surpassed the gas guzzler threshold of 22.5 mpg by a comfortable margin, achieving 23.1 on the EPA scale. HC, CO and NOx emission were also reduced. This info is on page 75. "

Big John return with:
"Like on the Internet don't believe everything you read!
My 93, 95, 96, 98 and 06 Corvettes plus my 95, 96 Camaros and 96 Roadmaster beat the gas guzzler tax! " (bolded emphasis mine-Hog)

Here John is stating that LIKE everything on the internet, don't believe everything you read. He is not saying that Goldcylon is actually citing the internet, merely that one must use caution when citing A source, be it a book, or the internet. He then goes on to list some C4 Corvettes AND other cars which also beat the guzzler tax.


Goldcylon IMO then mistook the previous post and then states this:

"I provided the proof from the Heart of the Beast by Anthony Young. I suggest you buy a copy and read it. It gives a lot if history about the LT5 program. I didn't relate something that somebodies cousins sisters brother posted to the Internet like you imply with this post.

Roadmasters and Camaros are an apple to oranges argument. The base C4 did not meet the EPAs threshold."

IMO the comments about the Roadmasers and Camaros weren't part of the comparison to the LT5 Corvette, but the LT1 Corvette(or base Corvette) when being compared to the LT5 Vette is certainly valid.


I then myself provided the EPA source that stated that there were no C4 Vettes that got the guzzler tax, and showed the vehicles that did get the tax.
"The only Corvette that I am seeing on the 49 state EPA list is the 1989 Callaway Turbo Vettes. There are only a couple GM vehicles on that list from 1986-1993. The TBI 350 Caprice(police version), Cadillac Allante, Cadillac Broughham and a commercial vehicles.

Of course the Dodge Viper is on that list with its 12mpg/20mpg city/highway ratings "

Then John stated:
"But Darrell's gold leaf book says not but LT5's!!!"
This response is worded oddly, so perhaps was misconstrued?
Which in essence says that what I provided cant be true because it goes against what the "Heart of the Beast" provides that the only C4 to not get the guzzler tax was the ZR-1.

Goldcylon IMO (perhaps because of the earlier misunderstanding regarding non Corvette comparisons, which really weren't part of the argument plus thinking that John literally said that Goldcylon has taken this info from the Internet, when this isn't what was really stated) and takes offense with this and writes:
"I said the LT5 was the only C4 corvette to beat the gas guzzlers tax. You are the individual talking about Camaros and the like. I made zero statements about any other vehicles. You and Hog went there. Just like you arrogantly decided I received my information from the Internet

It's in hard print as stated fact. The gold leaf book as you state is the standard on the LT5 program. However some folks will never believe what they read or see.

IMO Any source can have errors or omissions. be it a book or an internet site.

So the conundrum is:
1) Was the 1990-1995 ZR-1 Corvette the only C4 Corvette to be exempt from the EPA "Gas Guzzler" tax?

IMO this exchange clearly illustrates the importance of CLEARLY making a point, and CLEARLY understanding what is being read.
I could have been clearer when explaining the list I was referring to, I called it the EPA list, when I should have been clearer by saying the EPA list of cars that will receive the EPAs "Gas Guzzler" tax.

You can tell me to buzz off now. lol

[Hog]

The only C4 Corvette listed that got the gas guzzler tax (according to the EPA source)was the Callaway twin Turbo for 1990 and 1991 model years, listed under the Callaway company as the manufacturer.
For model year 1994, there not one single GM made car that is listed to get the gas guzzler tax.
MY1993
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1992
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1991
CALLAWAY CALLAWAY TWIN-TURBO CORVETTE 350cid/8 cylinders
GENERAL MOTORS BROUGHAM 350cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1990
GENERAL MOTORS BROUGHAM 350cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 273cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 273cid/8 cylinders
CALLAWAY CALLAWAY TWIN-TURBO CORVETTE 350cid/8 cylinders
MY1989
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 273cid/8 cylinders
MY1988
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
MY1987
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
MY1986
GENERAL MOTORS CAPRICE WAGON 305cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS PARISIENNE WAGON 305/8 cylinders
Here is the EPA document for perusal.
https://www3.epa.gov/fueleconomy/guzzler/420b06006.pdf
From the EPA website
https://www3.epa.gov/fueleconomy/guzzler/
I do remember that when the Chev group did the "ZR2 Big Doggie" C4 with a MARK 4 BBC with a TPI ECM that there was no way that a BBC equipped C4 would be marketable by GM as it competed with the upcoming LT5 equipped ZR1 car and that it would surely get tagged with the EPA gas guzzler tax and that was against policy.
http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/Engine/ZR2bigdoggie_zpsj3yzrvdg.jpg (http://s1202.photobucket.com/user/Paul_Schermerhorn/media/Engine/ZR2bigdoggie_zpsj3yzrvdg.jpg.html)
I don't know why there is an apparent conflict, the EPA source I listed was a simple quick search. I have no idea as to its accuracy or validity.
Errors or omissions can occur in any format.

[BigJohn]

Cool, y'all want to race?

[Corvettes White]

What is "The gold leaf book?". I have been following C4's since before there were any. And this is new to me. Thanks. George

[BigJohn]

We can put gold leaf on anything even chocolate cake!

Gold Leaf Book!

[GOLDCYLON]

What is "The gold leaf book?". I have been following C4's since before there were any. And this is new to me. Thanks. George

There is no gold leaf book that's is what BJ called it. I was referring to "The Heart of the Beast" by Anthony young. It's the best source of information to date that I am aware of of the LT5 program. It's worth the read

[GOLDCYLON]

The only C4 Corvette listed that got the gas guzzler tax (according to the EPA source)was the Callaway twin Turbo for 1990 and 1991 model years, listed under the Callaway company as the manufacturer.
For model year 1994, there not one single GM made car that is listed to get the gas guzzler tax.
MY1993
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1992
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1991
CALLAWAY CALLAWAY TWIN-TURBO CORVETTE 350cid/8 cylinders
GENERAL MOTORS BROUGHAM 350cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 279cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 290cid/8 cylinders
MY1990
GENERAL MOTORS BROUGHAM 350cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 273cid/8 cylinders
GENERAL MOTOR COMMERCIAL CHASSIS 273cid/8 cylinders
CALLAWAY CALLAWAY TWIN-TURBO CORVETTE 350cid/8 cylinders
MY1989
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS ALLANTE 273cid/8 cylinders
MY1988
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
MY1987
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
MY1986
GENERAL MOTORS CAPRICE WAGON 305cid/8 cylinders
GENERAL MOTORS CAPRICE 350cid/8 cylinders (Police Package)
GENERAL MOTORS PARISIENNE WAGON 305/8 cylinders
Here is the EPA document for perusal.
https://www3.epa.gov/fueleconomy/guzzler/420b06006.pdf
From the EPA website
https://www3.epa.gov/fueleconomy/guzzler/
I do remember that when the Chev group did the "ZR2 Big Doggie" C4 with a MARK 4 BBC with a TPI ECM that there was no way that a BBC equipped C4 would be marketable by GM as it competed with the upcoming LT5 equipped ZR1 car and that it would surely get tagged with the EPA gas guzzler tax and that was against policy.
http://i1202.photobucket.com/albums/bb373/Paul_Schermerhorn/Engine/ZR2bigdoggie_zpsj3yzrvdg.jpg (http://s1202.photobucket.com/user/Paul_Schermerhorn/media/Engine/ZR2bigdoggie_zpsj3yzrvdg.jpg.html)
I don't know why there is an apparent conflict, the EPA source I listed was a simple quick search. I have no idea as to its accuracy or validity.
Errors or omissions can occur in any format.

I have no idea either Paul far be it from me to debate the Vice President of GM who was quoted in the book that he said to send the L98 to Lotus since it could not beat their guzzler tax. Who the hell really knows. I have moved on

[Bradjon]

I average 26/28onthd freeway and 18 around town

[davidijaxson]

I get around 15 in town and maybe 18 or 19 on the highway. We can't get any pure gas in Dallas so I don't know what effect that has on the mileage.

[ram_g]

We can't get any pure gas in Dallas

Depending on where specifically you are it may not be that far away. There are several Buc-ees in a ring around Dallas (and Houston, FWIW) that carry Ethanol free gas. You may have to drive 30 miles or so, but that's what I do to get Ethanol free gas near Houston.

Just BTW, I've been running 92 octane Buc-ees Ethanol Free and I get roughly the same mileage as you, although I've only gone through 2 tankfuls so far so too early to tell.