What does your DTE say when you fill a full tank?
01-30-2010, 01:37 AM
#1
What does your DTE say when you fill a full tank?
I'm sort of curious about this actually.
what are your guy's DTE (distance till empty) fuel estimates after a full fill up?
Mine has been all over the place...
After a trip to SF the previous day, it showed 340 miles (I averaged 19.4 mpg that tank)
on average is says about 310 after fill up. miles. (I avg 17.4mpg)
It even showed 290 miles once. (.... i don't even want to know... i think it was 16.4mpg)
i mean that 340 was a fluke. I have never seen it on my 09. and yet I never saw less than that on my 08.
just out of curiosity, what does yours say? DTE at fill and maybe approx fuel economy following if you can remember.
I do realize that the initial number isn't exactly accurate & that some of you have driven on the highway to only see that number go up. which is why I'm only curious right after fill up.
what are your guy's DTE (distance till empty) fuel estimates after a full fill up?
Mine has been all over the place...
After a trip to SF the previous day, it showed 340 miles (I averaged 19.4 mpg that tank)
on average is says about 310 after fill up. miles. (I avg 17.4mpg)
It even showed 290 miles once. (.... i don't even want to know... i think it was 16.4mpg)
i mean that 340 was a fluke. I have never seen it on my 09. and yet I never saw less than that on my 08.
just out of curiosity, what does yours say? DTE at fill and maybe approx fuel economy following if you can remember.
I do realize that the initial number isn't exactly accurate & that some of you have driven on the highway to only see that number go up. which is why I'm only curious right after fill up.
01-30-2010, 11:52 AM
#4
As your post shows, DTE is dependent on what your average mileage was in the period before you filled up.
If your last average mileage was low, your DTE will be lower, if it was very high it will be higher. Try this: before filling up, reset your MPG screen to 0 before you do several miles of highway cruising. If you cruise on the highway at a steady 60-70 mph with little acceleration, you may get an average of 23-26 MPG or so. Fill up now and you will have a high DTE. The opposite is true too, if you set it to 0 then do hard acceleration and braking which wastes gas, or sit still with the engine idling for a while, it will be low, maybe 8 or 9 MPG and you sill get a low DTE when you fill up.
Also keep in mind that the DTE is a dynamic estimate. It changes as you drive and your average MPG changes. I have gotten 50 highway miles after it says ---- before as well, it's just an estimated and errs on the side of caution.
I've gotten DTE estimates form high 100's to low 400's.
If your last average mileage was low, your DTE will be lower, if it was very high it will be higher. Try this: before filling up, reset your MPG screen to 0 before you do several miles of highway cruising. If you cruise on the highway at a steady 60-70 mph with little acceleration, you may get an average of 23-26 MPG or so. Fill up now and you will have a high DTE. The opposite is true too, if you set it to 0 then do hard acceleration and braking which wastes gas, or sit still with the engine idling for a while, it will be low, maybe 8 or 9 MPG and you sill get a low DTE when you fill up.
Also keep in mind that the DTE is a dynamic estimate. It changes as you drive and your average MPG changes. I have gotten 50 highway miles after it says ---- before as well, it's just an estimated and errs on the side of caution.
I've gotten DTE estimates form high 100's to low 400's.
01-30-2010, 01:43 PM
#7
As your post shows, DTE is dependent on what your average mileage was in the period before you filled up.
If your last average mileage was low, your DTE will be lower, if it was very high it will be higher. Try this: before filling up, reset your MPG screen to 0 before you do several miles of highway cruising. If you cruise on the highway at a steady 60-70 mph with little acceleration, you may get an average of 23-26 MPG or so. Fill up now and you will have a high DTE. The opposite is true too, if you set it to 0 then do hard acceleration and braking which wastes gas, or sit still with the engine idling for a while, it will be low, maybe 8 or 9 MPG and you sill get a low DTE when you fill up.
Also keep in mind that the DTE is a dynamic estimate. It changes as you drive and your average MPG changes. I have gotten 50 highway miles after it says ---- before as well, it's just an estimated and errs on the side of caution.
I've gotten DTE estimates form high 100's to low 400's.
If your last average mileage was low, your DTE will be lower, if it was very high it will be higher. Try this: before filling up, reset your MPG screen to 0 before you do several miles of highway cruising. If you cruise on the highway at a steady 60-70 mph with little acceleration, you may get an average of 23-26 MPG or so. Fill up now and you will have a high DTE. The opposite is true too, if you set it to 0 then do hard acceleration and braking which wastes gas, or sit still with the engine idling for a while, it will be low, maybe 8 or 9 MPG and you sill get a low DTE when you fill up.
Also keep in mind that the DTE is a dynamic estimate. It changes as you drive and your average MPG changes. I have gotten 50 highway miles after it says ---- before as well, it's just an estimated and errs on the side of caution.
I've gotten DTE estimates form high 100's to low 400's.
so far my mpg tracker has no effect on my initial DTE. I can reset it on the highway and it'll still read 290-310. I'll actually try a reset it before fill up and see if I can influence that number.
so my story is that I have/had 4 Gs... an 04 coupe, had the 08sedan, have the 08 coupe, and the 09 sedan. both 08s always report more 340+ and My fuel eco in the 09 sucks monkey *****... it's worse than the 04 coupe and that thing has the Greedy TT system...(I can get 17 combined driving hard...) I'm a pretty conservative driver... I can get like 17mpg combined in an 500HP E55 AMG for crying out loud.
if you guys see fill up over 340+ and can get 22+MPG, maybe when I received the car some punk messed up the initial break in learning process... (car was delivered with 136 miles) I might have to see if I can get a full factory reset performed or something.
Last edited by mw09g37; 01-30-2010 at 04:30 PM.
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01-30-2010, 04:31 PM
#10
and I'm guessing on avg your fill ups are about 14-15 gallons?
I agree with a lot that the calculation is based on total volume*previous mpg. but don't you think if you're getting 20mpg you should be seeing like 400 on avg? if you see 310... thats like 15.5mpg, 19mpg would see 380 ish. if you see 340 were you getting 17mpg??
I mean this is all going into a big spreadsheet to help figure out what's going on with the fuel eco. like the other poster asked his said 275... was he doing 13.75 previous? I highly doubt it.. but hell. that'd be some heavy driving...
the car is rated to do 18-20. why aren't all of us seeing at least 340? are we all driving below 17mpg? Why are some able to drive hard while others are driving like grandmas still seeing at best 18.
Last edited by mw09g37; 01-30-2010 at 04:43 PM.
01-30-2010, 04:47 PM
#13
yeah cold weather does have a pretty good effect (most people would say 2-3 mpg during ~38F winter. weather is the other culprit, car drives differently under rain and snow conditions too..)
city driving will be the other culprit.
but taking into account all of that, i think 17mpg is pretty damn good if we're talking below 45F and city driving.
