A special driver training mpg dispensation?
#11
Re: A special driver training mpg dispensation?
You present a fine example to demonstrate the "interval fuel economy calculating trick", Bob.
200 miles @ 83.6 mpg -> 2.39 gal fuel used
250 miles @ 79.4 mpg -> 3.15 gal fuel used
Thus 0.76 gal were used during the last 50 miles -> 65.8 mpg on that stretch. Left as exercise for readers: perform similar calculations on Bob's recovery efforts.
DAS
200 miles @ 83.6 mpg -> 2.39 gal fuel used
250 miles @ 79.4 mpg -> 3.15 gal fuel used
Thus 0.76 gal were used during the last 50 miles -> 65.8 mpg on that stretch. Left as exercise for readers: perform similar calculations on Bob's recovery efforts.
DAS
#12
Re: A special driver training mpg dispensation?
Apparently you didn't read down to post #9 in this thread. It was worse than before. But hey, I really appreciate your calculations. Please calculate for me/us the damage described in post #9 of this thread, and my recovery efforts to date.
Today, as I sit, he has had no more drive time, and I am at 75.7 mpg at 705.3 miles.
Thanks, Bob
Today, as I sit, he has had no more drive time, and I am at 75.7 mpg at 705.3 miles.
Thanks, Bob
Originally Posted by Tochatihu
You present a fine example to demonstrate the "interval fuel economy calculating trick", Bob.
200 miles @ 83.6 mpg -> 2.39 gal fuel used
250 miles @ 79.4 mpg -> 3.15 gal fuel used
Thus 0.76 gal were used during the last 50 miles -> 65.8 mpg on that stretch. Left as exercise for readers: perform similar calculations on Bob's recovery efforts.
DAS
200 miles @ 83.6 mpg -> 2.39 gal fuel used
250 miles @ 79.4 mpg -> 3.15 gal fuel used
Thus 0.76 gal were used during the last 50 miles -> 65.8 mpg on that stretch. Left as exercise for readers: perform similar calculations on Bob's recovery efforts.
DAS
#13
Re: A special driver training mpg dispensation?
Originally Posted by rjbarlow
Apparently you didn't read down to post #9 in this thread. It was worse than before. But hey, I really appreciate your calculations. Please calculate for me/us the damage described in post #9 of this thread, and my recovery efforts to date.
Today, as I sit, he has had no more drive time, and I am at 75.7 mpg at 705.3 miles.
Thanks, Bob
Today, as I sit, he has had no more drive time, and I am at 75.7 mpg at 705.3 miles.
Thanks, Bob
115 miles earlier, you were at 267 miles and 80.2 mpg. This means 3.33 gal were consumed at this point.
Also, it means that 2.16 gal were used for the final 115 miles. This gives a fuel economy of 53.2 mpg. Your son is already beating the EPA numbers.
What is the error in your display?
#14
Re: A special driver training mpg dispensation?
Originally Posted by Mr. Kite
Your son is already beating the EPA numbers.
What is the error in your display?
What is the error in your display?
It is gratifying to know that my son is beating the EPA numbers, especially with all of the stop and go he did and idling without autostop, but 53 mpg for 115 miles sure puts a beating on a 83 mpg tank.
BTW, has anyone calculated the mpg of my recovery efforts? I suppose I could do it myself, but I was a history major and haven't taken a math course in 32 years! (I am sorry for dumping on my history degree again, but my law degree pays my bills so I have a hard time dumping on it. )
#15
Re: A special driver training mpg dispensation?
Originally Posted by rjbarlow
Actually, for the last several thousands of miles, my display usually reads dead-on or 2 or 3 mpg lower than the actual calculated mpg.
It is gratifying to know that my son is beating the EPA numbers, especially with all of the stop and go he did and idling without autostop, but 53 mpg for 115 miles sure puts a beating on a 83 mpg tank.
BTW, has anyone calculated the mpg of my recovery efforts? I suppose I could do it myself, but I was a history major and haven't taken a math course in 32 years! (I am sorry for dumping on my history degree again, but my law degree pays my bills so I have a hard time dumping on it. )
It is gratifying to know that my son is beating the EPA numbers, especially with all of the stop and go he did and idling without autostop, but 53 mpg for 115 miles sure puts a beating on a 83 mpg tank.
BTW, has anyone calculated the mpg of my recovery efforts? I suppose I could do it myself, but I was a history major and haven't taken a math course in 32 years! (I am sorry for dumping on my history degree again, but my law degree pays my bills so I have a hard time dumping on it. )
After 382 miles, you were at 69.6 mpg. This means 5.49 gal were consumed.
(382 miles divided by 69.6 miles per gallon equals 5.49 gallons)
After 705.3 miles, you were at 75.7 mpg for a total of 9.32 gallons used.
Take the differences to get 323.3 miles and 3.83 gallons for a fuel economy of 84.4 mpg.
Not too shabby.
#16
Re: A special driver training mpg dispensation?
Attempting this higher math on my own...today I went to the office, 2 courts, back to the office and then back home. It was a round trip of 92.4 miles, and at the end my trip meter reads 797.7 miles and 76.8 mpg (10.3867 gallons). Subtracting Mr. Kite's previous calculation of 9.32 gallons I calculate that I used 1.0667 gallons over the 92.4 miles, for an interval FE of 86.62 mpg. Am I doing this right?
#17
Re: A special driver training mpg dispensation?
Originally Posted by rjbarlow
Attempting this higher math on my own...today I went to the office, 2 courts, back to the office and then back home. It was a round trip of 92.4 miles, and at the end my trip meter reads 797.7 miles and 76.8 mpg (10.3867 gallons). Subtracting Mr. Kite's previous calculation of 9.32 gallons I calculate that I used 1.0667 gallons over the 92.4 miles, for an interval FE of 86.62 mpg. Am I doing this right?
#18
Re: A special driver training mpg dispensation?
Originally Posted by Mr. Kite
Here goes:
After 382 miles, you were at 69.6 mpg. This means 5.49 gal were consumed.
(382 miles divided by 69.6 miles per gallon equals 5.49 gallons)
After 382 miles, you were at 69.6 mpg. This means 5.49 gal were consumed.
(382 miles divided by 69.6 miles per gallon equals 5.49 gallons)
My recovery efforts over the 777 miles since my son last drove required 9.23681 gallons for an average of 84.1 mpg to get my 83.6 mpg tank to recover from my son's driver training of 69.6 back up to the 78.7 aggregate.
#19
Re: A special driver training mpg dispensation?
My oldest is almost 13 years old so he has some time left before driving but still notices everything I do. With that said I'm not putting as much effort into hypermiling as when I'm solo.
Last month while we were on the way home from a store he asked me why I don't drive like everyone else. I explained that I fill my tank about every 10-12 days and it costs around $40, and if I drove like everyone else that would almost double.
I'm teaching him that all actions have consequences and fuel economy is no exception. At the time of this conversation we were alone on a 55MPH single lane rural country highway going about 42-43MPH. I pointed out my FCD and showed him the upper 60's figure and what that meant, and if we would have chosen the 70 limit freeway it would be low-mid 50's at best- and more frequent fill ups.
These kind of lessons aren't usually taught in drivers education and it's our responsibility to let them know.
-Steve
Last month while we were on the way home from a store he asked me why I don't drive like everyone else. I explained that I fill my tank about every 10-12 days and it costs around $40, and if I drove like everyone else that would almost double.
I'm teaching him that all actions have consequences and fuel economy is no exception. At the time of this conversation we were alone on a 55MPH single lane rural country highway going about 42-43MPH. I pointed out my FCD and showed him the upper 60's figure and what that meant, and if we would have chosen the 70 limit freeway it would be low-mid 50's at best- and more frequent fill ups.
These kind of lessons aren't usually taught in drivers education and it's our responsibility to let them know.
-Steve
#20
Re: A special driver training mpg dispensation?
Originally Posted by Hot_Georgia_2004
My oldest is almost 13 years old so he has some time left before driving but still notices everything I do. With that said I'm not putting as much effort into hypermiling as when I'm solo.
Last month while we were on the way home from a store he asked me why I don't drive like everyone else. I explained that I fill my tank about every 10-12 days and it costs around $40, and if I drove like everyone else that would almost double.
I'm teaching him that all actions have consequences and fuel economy is no exception. At the time of this conversation we were alone on a 55MPH single lane rural country highway going about 42-43MPH. I pointed out my FCD and showed him the upper 60's figure and what that meant, and if we would have chosen the 70 limit freeway it would be low-mid 50's at best- and more frequent fill ups.
These kind of lessons aren't usually taught in drivers education and it's our responsibility to let them know.
-Steve
Last month while we were on the way home from a store he asked me why I don't drive like everyone else. I explained that I fill my tank about every 10-12 days and it costs around $40, and if I drove like everyone else that would almost double.
I'm teaching him that all actions have consequences and fuel economy is no exception. At the time of this conversation we were alone on a 55MPH single lane rural country highway going about 42-43MPH. I pointed out my FCD and showed him the upper 60's figure and what that meant, and if we would have chosen the 70 limit freeway it would be low-mid 50's at best- and more frequent fill ups.
These kind of lessons aren't usually taught in drivers education and it's our responsibility to let them know.
-Steve
He also understands that the map car (HCH) gets better gas mileage than my Scion XB. And that my red car (AWD turbocharged Talon<---not Earth friendly but it's a blast to drive 18-19mpg 4 cylinder) gets really crappy gas mileage but is fast.