January 2007 MPG Averages

[Tideland Prius]

23rd Dec - 2nd Jan

Tank Miles: 556.3km
Total Miles: 40663.4km

MFD Avg: 4.8L/100km
Calc'd Avg: 5.34L/100km

Fuel Added: 29.700 litres
Cost: $30.12

[gs1561]

Second tank. I'm lovin' this car.

28rd Dec - 9th Jan

Tank Miles: 436
Total Miles: 828

MFD Avg: 51.7 MPG
Calc'd Avg: 52.0

Fuel Added: 8.39 gal.
Cost: $18.70

[Tideland Prius]

2nd Jan - 15th Jan

Tank Miles: 568.8km
Total Miles: 41232.2km

MFD Avg: 5.0L/100km
Calc'd Avg: 4.89L/100km

Fuel Added: 27.804 litres
Cost: $27.36

Avg Temps: -5°C

[jul-b'ar]

January 12, 2007

Trip Miles: 365 miles
Total Miles: 607 miles

MFD Avg: MPG Uh.... what's MFD? I figure 40.57 MPG (365 / 8.996)
Calc'd Avg: Uh... how's this different? Rounded? 41 MPG?

Fuel Added: 8.996 gal.
Cost: $24.20 ($2.69/gal - E10 - 1st tank of this... we'll see how the mileage bears out)

QUESTION: Since the gas bladder doesn't hold a fixed amount of gas, how reliable is the fuel economy computation? Do you go by the total number of trip miles for that tank & divide that by the amount of gallons you put in when it was empty?


Thanks for the support for those of us who are occassionally mathematically challenged,
Jul-b'ar

[TonyPSchaefer]

QUESTION: Since the gas bladder doesn't hold a fixed amount of gas, how reliable is the fuel economy computation? Do you go by the total number of trip miles for that tank & divide that by the amount of gallons you put in when it was empty? unsure.gif [/b]

The MFD provides the accurate computation of MPG. Hand-calculated computations can not be accurately performed. Sad, but true.

My report:
Got gas a few days ago.

Date: Jan 11, 2007
Tank MPG Average: 54.5
Tank Average Temp: 37.8ºF
Improvement over last tank: 0.6MPG
Gas Consumed: 9.610 gal.
Tank Miles Driven: 459.4

Lifetime Average: 50.5
Lifetime Gas Consumed: 547.88
Total Miles: 27,647

This new tank started off most horribly. This morning I had to run the engine to defrost the windshield. After about 85 miles, my current tank MPG is around 45.3. I really want to get it up to 50.0MPG or better. Historically, December and January provide my worse tanks; hopefully if I can make it through this month it's straight up from here.

Click the link in my signature for all the details.

[troe]

Jan. 5th thru Jan 12th
Tank MPG = 58.5 calculated, 59.8 MFG
miles driven = 577.4
fuel added = 9.874 gallons
tank average temperature = 60 F
driving conditions = 60% hiway at 55 - 70 MPH, 40 city at 35-45 MPH.
Hiway this tank was totally without cruise, saw 5 MPG improvement by not using cruise.

[barbaram]

It's been very mild here for the most part. av. temp according to PSE&G =46

SO FAR:
MILES 1138.4
GAL 24.405
MPG 46.6462

Still smiling!

[Beryl Octet]

I haven't bought gas all year, I'm seeing 53.4 on the display for this tankful, 72 degree days help.

[daveleeprius]

East of Seattle it's been in the 20s and 30s lately. I filled up recently with two pips left on the gas gauge, and could only get 6 gallons in. It was snowing outside at the time. My lifetime milage is 42.4mpg on the MFD for around 1750 miles of driving since mid October. 25 miles into the new tank, the first pip went out. Looking forward to summertime when I can get more gas into the tank.

Dave

[Fibb222]

<div class='quotetop'>QUOTE(Tideland Prius @ Jan 6 2007, 10:12 AM) [snapback]371788[/snapback]</div>

23rd Dec - 2nd Jan

Tank Miles: 556.3km
Total Miles: 40663.4km

MFD Avg: 4.8L/100km
Calc'd Avg: 5.34L/100km

Fuel Added: 29.700 litres
Cost: $30.12
[/b]

Darn! I can't compete with you Tideland. Please tell me you drive at least 20 minutes each time you get in the car and spend most of your time on the freeway. My trips are usually about 12 minutes and almost never on a freeway. If it is on a freeway it is usually up the steep malahat highway! Doh!