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Topic: Fuel reading on full digi cluster compared to AVG Econ. (Read 1711 times) previous topic - next topic

Fuel reading on full digi cluster compared to AVG Econ.

I just drove up to Ohio for some TMobile work here in Kent and noticed something on my 20th digital cluster.

Fuel tank said i am now at 12 gallons
AVG ECON said i am at 22.3 miles per gallon (I reset the econ when i hit level land in Marrietta oh).
Total miles driven was 280 when i notice this issue

My fuel meter says F when i fill it
When it leaves "F", it falls to 21 gallons so that means its approx 22gal tank.



so back to my point,, my tank said 12 gal and i had driven 280miles yet my avg econ was saying something that did not add up.

If i go 280miles on 10 gallons used, thats 28miles to the gallon highway.

This is just an observation, my Real gas consumption is not actually displaying even after i reset the avg econ when i hit level ground.

Ill be all over the NE portion of ohio for the next 3 weeks or so.

Fuel reading on full digi cluster compared to AVG Econ.

Reply #1 –
just filled up here in kent area, 13.2 gal to cover 349miles of driving.

Avg Econ says 22.8mpg

calculator says 26.4mpg

see what i mean?

Fuel reading on full digi cluster compared to AVG Econ.

Reply #2 –
Had you reset your average at fillup,  you'd likely be closer to an accurate display. That's what i do with mine.  I then do the math at each fill and the digital cluster has always been within 0.5 mpg of the actual. Some guys won't consider that to be accurate, but it's close enough for me.

Fuel reading on full digi cluster compared to AVG Econ.

Reply #3 –
Yeah, and thanks for letting me know that you're in my 'hood. ;)

The bars on the digital display are arbitrary and don't represent any actual amounts. So don't ever go by those for anything LOL.

The fuel computer is basing on averages the computer sees, but is not really super accurate either. I don't even trust them in newer cars...it's been more often on the incorrect side in both my folks' 2010 Fusion and Woman's 2009 Milan.

The only way to figure real, true fuel economy is to fill the tank, drive a distance, fill up again, and divide the mileage travelled by the number of gallons you just put in. Easy peasy.

That being said...28mpg is likely correct, even in mixed driving. In the past I've achieved anywhere from 28-32 on the highway with the 5.0L V8 and 2.73 gears (i.e. not the convertible). Hell, I've even achieved 21-22mpg on the highway in the Mountaineer 5.0. City is more like 12-14, but yeah, highway is a noticeable improvement.

The 5.0 likes the highway, that is for certain. Keep it steady on open roads and it will reward you nicely.

Fuel reading on full digi cluster compared to AVG Econ.

Reply #4 –
got it,, thanks eric, just wanted to mention this.  I to have a 2.xx rear gear think its a .73 like yours.
holds about 2000rpm at 70mph there abouts.
Yep, ill be all over your kneck of the woods here from the lake to Erie down through youngstown, canton ect.
Doing days and nights...
I am really enjoying running the coug now, so darn glad to get rid of the company explorer.  This makes my road time more enjoyable.

gotta hit these sites this week, moving a little more south next week hopefully with the wife along side.

545 Gordon Ave.   Amherst   OH
3970 Pearl Road   Cleveland   OH
1859 Root Rd.   Lorain   OH
7401 Northfield Road    Bedford   OH
1328 Grandview Rd   Erie   PA
61 E Taylor Rd   Bedford   OH
3710 Ada Ave.   Lorain   OH
12050 Lake Ave.   Lakewood   OH
1530 High Street   Erie   PA
1072 Jacoby Road   Copley   OH
549 Hall Rd.   Elyria   OH
9845 Darrow Road   Twinsburg   OH
528 Water Street   Fairport Harbor   OH
1431 W. 12th St.   Erie   PA
20123 Lorain Rd.   Fairview Park   OH
4600 Lander Road   Orange Village   OH
164 Eastland Rd.   Berea   OH


foe
yeah, reset everything at fill up this morn around 7am.
reset the econ when i just entered more respecable land to drive on to get a good reference for mpg.

darn thing makes it look worse than what it is.

I just purchased a trip minder, i may put it in and enjoy watching my dash disagree with the trip minder.
Not sure if anyone has put a trip minder in a 20th yet,, might be first.

Fuel reading on full digi cluster compared to AVG Econ.

Reply #5 –
I'm nowhere near those locations LOL
That's all Cleveland-ish and stuff. I'm about 1.5 hours southeast. But if you're going to be close, give me a holler (same number still).

Fuel reading on full digi cluster compared to AVG Econ.

Reply #6 –
will do,,

Fuel reading on full digi cluster compared to AVG Econ.

Reply #7 –
Mine is off due to the calibrated MAF and 24lb injectors, as the computer thinks it's firing 19lb injectors. I'm not sure by how much, as I never tried to figure it out. The car is not a daily driver so I'm not very concerned about gar mileage. I do know my highway mileage is around 21 mpg with 3.73 gears and a non lock up torque converter.

What's really amazing is the 2012 Mustang V6 we have. It has 305hp but gets 30 mpg at 70 mph. It's probably due to the 6 speed auto.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

Fuel reading on full digi cluster compared to AVG Econ.

Reply #8 –
Are you resetting the all the functions when you fill up?  Also stopped and ideling will drop what the computer shows for mileage.
Mike

Fuel reading on full digi cluster compared to AVG Econ.

Reply #9 –
Idleing kills mileage on the digi dash. Even just having the key on does. Also if you cycle your key on and off a few times, it drops about .2mpg every time. When I worked at domino's doing a lot of quick trips, my gauge would read 16mpg and I sometimes got as high as 19mpg, only city, calculating with filling up gas and dividing the numbers.

On a straight freeway trip, slowing down to 55mph or so can get you into the 35mpg range, average of 26-32 or so wish mixed 65-75 was my average. Sometimes as low as 25-28mph though. Using cruise is less efficient if your on flat roads.

I've found straight freeway treip, the computer is usually about 1 mpg off of what I calculate at the pump. Sometimes higher or lower.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

Fuel reading on full digi cluster compared to AVG Econ.

Reply #10 –
I ran back up here again, filled up in lewisburg wv.
at the end of my trip up and my driving from town to town i ended up dumping 17.1gal into the tank with 450mi behind me.
This time i did not touch the reset, just stopped a couple time turning the car off each time then back on.
Fuel computer was insisting 22.3mpg.

fuel digi gauge said i had approx 5gal remaining.

dono guys, thanks for the tid bits of info on key on/off as well as idle time.  I have very little idle except for when i departed the interstate to hit the 5 towns i needed to visit.
 

Fuel reading on full digi cluster compared to AVG Econ.

Reply #11 –
Quote from: mcb82gt;398204
Are you resetting the all the functions when you fill up?  Also stopped and ideling will drop what the computer shows for mileage.

I did on last weeks trip,
this week i did not.