How accurate is the 1st tank mpg data?
#1
How accurate is the 1st tank mpg data?
Hi,
I am not sure if I should enter my 1st tank into the database, as the values is definitely not accurate.
I receive the car with a half filled tank. So, on the 1st top up, my mpg is . Since the mileage travelled is very low, and yet I need to top up more than half a tank.
What is the practise here? Should I just remove my 1st tank, and make my 2nd tank the 1st?
I am not sure if I should enter my 1st tank into the database, as the values is definitely not accurate.
I receive the car with a half filled tank. So, on the 1st top up, my mpg is . Since the mileage travelled is very low, and yet I need to top up more than half a tank.
What is the practise here? Should I just remove my 1st tank, and make my 2nd tank the 1st?
#2
Re: How accurate is the 1st tank mpg data?
Originally Posted by helicraz
Hi,
I am not sure if I should enter my 1st tank into the database, as the values is definitely not accurate.
I receive the car with a half filled tank. So, on the 1st top up, my mpg is . Since the mileage travelled is very low, and yet I need to top up more than half a tank.
What is the practise here? Should I just remove my 1st tank, and make my 2nd tank the 1st?
I am not sure if I should enter my 1st tank into the database, as the values is definitely not accurate.
I receive the car with a half filled tank. So, on the 1st top up, my mpg is . Since the mileage travelled is very low, and yet I need to top up more than half a tank.
What is the practise here? Should I just remove my 1st tank, and make my 2nd tank the 1st?
Bob Wilson
Last edited by bwilson4web; 07-24-2006 at 05:19 AM.
#3
Re: How accurate is the 1st tank mpg data?
I just thought the data will be more acuurate if everyone 'started' with a car that is with a full tank. I dunno about other countries, but I just have to dive a few miles from the dealer to get my tank top up full. My 2nd fill up will actually shows how much fuel I used for the initial run in. The 1st fill-up only show how little fuel my dealer gave me when I collected the car... :-(
#4
Re: How accurate is the 1st tank mpg data?
Originally Posted by helicraz
I just thought the data will be more acuurate if everyone 'started' with a car that is with a full tank. I dunno about other countries, but I just have to dive a few miles from the dealer to get my tank top up full. My 2nd fill up will actually shows how much fuel I used for the initial run in. The 1st fill-up only show how little fuel my dealer gave me when I collected the car... :-(
Bob Wilson
#5
Re: How accurate is the 1st tank mpg data?
Ah... ok. I will re-adjust my data later and kiv the 1st tank... it should be around 30+mpg instead of 1.6 mpg. :-)
I just feel so strange... for one moment I thought I drive a tank..
I just feel so strange... for one moment I thought I drive a tank..
Last edited by helicraz; 07-24-2006 at 06:23 AM.
#6
Re: How accurate is the 1st tank mpg data?
Originally Posted by helicraz
Ah... ok. I will re-adjust my data later and kiv the 1st tank... it should be around 30+mpg instead of 1.6 mpg. :-)
I just feel so strange... for one moment I thought I drive a tank..
I just feel so strange... for one moment I thought I drive a tank..
GOOD LUCK!
Bob Wilson
#7
Re: How accurate is the 1st tank mpg data?
Originally Posted by helicraz
I receive the car with a half filled tank. So, on the 1st top up, my mpg is . Since the mileage travelled is very low, and yet I need to top up more than half a tank.
#8
Re: How accurate is the 1st tank mpg data?
Mr. Kite,
I included my first tank data even though there was a large difference between MFD (53.5) and hand calculated (45.5) mpg values. The dealer topped off the car before I took delivery and may not have filled it like I did after I drove my first tank; hence what I think accounts for the large difference in numbers above.
I am only on my second tank and things are much better so far. 65.8 mpg over 530 miles.
You should scrap the first tank values and start with tank #2 for the database as it would be an educated guess for your first tank based on your fill-up. You could use MFD data instead? There are many arguments for and against this.
Thanks,
Chris
I included my first tank data even though there was a large difference between MFD (53.5) and hand calculated (45.5) mpg values. The dealer topped off the car before I took delivery and may not have filled it like I did after I drove my first tank; hence what I think accounts for the large difference in numbers above.
I am only on my second tank and things are much better so far. 65.8 mpg over 530 miles.
You should scrap the first tank values and start with tank #2 for the database as it would be an educated guess for your first tank based on your fill-up. You could use MFD data instead? There are many arguments for and against this.
Thanks,
Chris
#9
Re: How accurate is the 1st tank mpg data?
Originally Posted by VaBeachPrius
Mr. Kite,
I included my first tank data even though there was a large difference between MFD (53.5) and hand calculated (45.5) mpg values. The dealer topped off the car before I took delivery and may not have filled it like I did after I drove my first tank; hence what I think accounts for the large difference in numbers above.
I am only on my second tank and things are much better so far. 65.8 mpg over 530 miles.
You should scrap the first tank values and start with tank #2 for the database as it would be an educated guess for your first tank based on your fill-up. You could use MFD data instead? There are many arguments for and against this.
Thanks,
Chris
I included my first tank data even though there was a large difference between MFD (53.5) and hand calculated (45.5) mpg values. The dealer topped off the car before I took delivery and may not have filled it like I did after I drove my first tank; hence what I think accounts for the large difference in numbers above.
I am only on my second tank and things are much better so far. 65.8 mpg over 530 miles.
You should scrap the first tank values and start with tank #2 for the database as it would be an educated guess for your first tank based on your fill-up. You could use MFD data instead? There are many arguments for and against this.
Thanks,
Chris
I was pretty confident with my first tank numbers. I drove of the lot with what appeared to be a full tank of gas and a total of 5 miles on the odometer. I'm sure the tank was filled up at less than the 5 miles. This would mean that I got a few "free" miles. With my first fill-up, the dash showed FE of 46.1mpg and I calculated 47.6mpg. Over several tanks, my dash has averaged 1.9% lower than what I calculate. I see no reason to not include the first tank--except it would delete one of my "learning" tanks and increase my average.
As for the Prius, it is equipped with a bladder-style gas tank. I have friends with these and large tank-to-tank variations in the calculated (relative to the MFD) fuel economy are to be expected.
#10
Re: How accurate is the 1st tank mpg data?
Originally Posted by Mr. Kite
On the window sticker, I thought it said that a full tank of gas is complementary. Your dealer was cheap or forgetful.
I paid a premium for my car (about USD50k) due to the mark ups and taxes, and yet I don't even get as long warranty for my NiHms as what is offered in USA. My last car had just 1/8 tank when I got it. It is a norm over this part of the world.