Who would've thunk it.

So you are saying that Ford and Lincoln both just happened to rate the highway fuel mileage of the Mark VIII under by 9 MPG? Why would they have done this for?

Maybe on a very long trip on flat or downhill grades while barely pushing on the gas or on cruise you will see high numbers, Every day numbers in a fairly large city with plenty of stop & go traffic is more like the 16-17 MPG that I said. If these cars really could get such high city & highway numbers then why doesn't everyone own them? I know, because the gas stations would go out of business!!!!!!! LOL
 
turborich said:
So you are saying that Ford and Lincoln both just happened to rate the highway fuel mileage of the Mark VIII under by 9 MPG? Why would they have done this for?

Maybe on a very long trip on flat or downhill grades while barely pushing on the gas or on cruise you will see high numbers, Every day numbers in a fairly large city with plenty of stop & go traffic is more like the 16-17 MPG that I said. If these cars really could get such high city & highway numbers then why doesn't everyone own them? I know, because the gas stations would go out of business!!!!!!! LOL
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first off,Ford/Lincoln doesnt rate there cars mpg,the Government does,Secondly when we get out on the highway and drive a steady 70mph or whatever speed,that is NOT how EPA MPG highway is determined,that is more like "expressway mpg"

here is EPA tests:

Quoted""""The "city" program is designed to replicate an urban rush-hour driving experience in which the vehicle is started with the engine cold and is driven in stop-and-go traffic with frequent idling. The car or truck is driven for 11 miles and makes 23 stops over the course of 31 minutes, with an average speed of 20 mph and a top speed of 56 mph. The "highway" program, on the other hand, is created to emulate rural and interstate freeway driving with a warmed-up engine, making no stops (both of which ensure maximum fuel economy). The vehicle is driven for 10 miles over a period of 12.5 minutes with an average speed of 48 mph and a top speed of 60 mph. Both fuel economy tests are performed with the vehicle's air conditioning and other accessories turned off.

Throughout the test, a hose is connected to the vehicle's tailpipe and collects the engine's exhaust. The amount of carbon present in what's spewed from the exhaust system is measured to calculate the amount of fuel burned. The EPA claims this is more accurate than using a fuel-gauge to physically measure the amount of gasoline being burned. Still, the final fuel economy figures are adjusted downward, by 10 percent for city driving and 22 percent in highway mileage, to help reflect the differences between what happens in a lab and out on an actual road,,,,,,end of Quote""""""

Also the reason a big car with a V8 exceeds the highway number more than a tiny car with a 4 is because at 60+ mph the v8 is still just loafing along,where as the little 4 is now really starting to have to spin 3000 + rpms,so in the epa tests where they are going 48-60 that little engine gets 35mpg,but drive it 70+mph constant and it might only get 1-2 mpg better,

this happens in most every car,little engined cars get almost what they are rated highway,bigger engined cars exceed their highway rating,but might not even meet their city.like some of us on here who get 12-15 mpg in town.
 
I'm not agreeing or disagreeing with anyone exactly here, but .. it seems a couple people think stroker motors are pig thirsty. Simply stroking your motor should only help your mileage, torque's free power as far as I'm concerned. Unless it's due to boost.

Granted most stroker motors aren't only stroked. They usually get bigger carbs/injectors, headwork, etc.

But taking your stock engine and just stroking it should only help mileage.
 
im just posting what i experienced. 29+ from portland to sacramento. that is from near sea level, over a 4000' pass, and back down to near sea level. not quite the flat partial throttle youre thinking.


in 100% city i average 12-14.
 
I can pretty much put this debate to bed. I own Frogman's car and it is not even close as far as mpg goes, not that I was even the least bit surprised.:p

However, we are chasing down the fuel mapping issues like Roadboss was. I know a lot of guys have taken a swing at this computer computation thing, guess it is my turn to strike out.:D
 
you can throw the mpg on the screen out the window, it changes everytime you get gas, and takes an average from each time you shut the car off, it is not accurate, its close, the only way you'll ever truely find out what you get for mpg is with your gas tank, fill it, and drive it till its empty, keeping track of how many gallons you put in it at the pump. i also will stand behind the 33 bs mpg. theres no way in hell you'll get that kind of mileage, i dont care what the screen says, atm's are not supposed to screw up giving you extra money, but they do and i have had it happen to myself, the car's screen is a computer, and computers are not always accurate, you'll never see 33 mpg in a mark VIII that burns gasoline, ever.

edit: here is a test for you, drive the car on miles left till empty, i'll bet you a million bucks you will run out of gas and be sitting on the side of the road, and your message center will say 30 miles till empty, or any number, doesnt have to be 30, but the number remaining will be quite a bit, its happened to me twice in both of my 93's, thats why you cant trust it, its an estimate, the whole system works on an average of miles you drive per everytime you start the car.
 
jamie97lsc said:
edit: here is a test for you, drive the car on miles left till empty, i'll bet you a million bucks you will run out of gas and be sitting on the side of the road, and your message center will say 30 miles till empty, or any number, doesnt have to be 30, but the number remaining will be quite a bit, its happened to me twice in both of my 93's, thats why you cant trust it, its an estimate, the whole system works on an average of miles you drive per everytime you start the car.
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not true I have done this many times I get gas when it is at 1 or 2 miles untill empty
 
Is it that good of an idea to let a 15 year car knowing that most have not been the first and sole owner get to the bottom of the tank? can you vouche for the filters used at every pump? I personally dont let any of my cars get below ~3 gallons. theres no telling what goodies lay in the bottom of the tank ready to murder a pump in cold blood.
 
slowmkviii said:
not true I have done this many times I get gas when it is at 1 or 2 miles untill empty
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Believe it or not, fuel pumps get hot. Now you are running the tank dry which means there is not enough gas to cool the pump. Not a good idea on many levels.
 
with the 5.0L stroker in my 1st mark while it was N/A computer would read 32mpg but tank to miles calculations were@ 28 for all highway and 18 combined mpg when computer would be reading 22mpg. Never tested it with the kenne bell on it but w/ the way i drove it, it got about 2 gallons to the mile....LOL
 
I had asked Dennis R to get a hold of Jerry W. as I had understood Jerry did work on the mapping issue at one time but never finished or concluded anything. Was hoping that with some of the sway Dennis had may be they could furnish a program to recalc the the new curve in the reporting function. I've given up at this point, just going back to the old basics of watchin the needle on the fuel gage.
 
my mark under optimal conditions using a calculator and logs, gets around 20 combined city and highway over the course of a tank.

on long highway trips it will average 29. VERY very close to the car's display.

have to see now that it's gonna get chipped what it will be like.
 
Roadboss said:
I had asked Dennis R to get a hold of Jerry W. as I had understood Jerry did work on the mapping issue at one time but never finished or concluded anything.
Click to expand...

I'm gonna have Dennis send me a new tune specific to want I want and need. We'll see if he can do it or not.

I'm starting to do some datalogging in prep for an upcoming dyno-tune session. We're gonna take a stab at it. I've got three computers to screw around with so if I kill one for whatever reason, it will have died for a good cause.:)
 
MonsterMark said:
Believe it or not, fuel pumps get hot. Now you are running the tank dry which means there is not enough gas to cool the pump. Not a good idea on many levels.
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not true there is still gas in the tank. my friend has run his at least 10 miles past 0 and still didnt run out of gas. I do like to keep mine above 1/4 of a tank
but I like to know how far it will go
 
slowmkviii said:
not true there is still gas in the tank. my friend has run his at least 10 miles past 0 and still didnt run out of gas. I do like to keep mine above 1/4 of a tank but I like to know how far it will go
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OK. Sucking up crap from the bottom of the tank and letting the pump overheat do not add to the life of a pump. Hope your bud likes dropping gas tanks.:shifty:
 
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