Fuel Tracking – 2016 – End of Year

Three months into winter up here in the North and the MPG takes a dive!

All 2016 data is based on a highway commute averaging 2,468 ± 247 miles per month.  This was done over the same stretch of highway, in the same 2004 V6 Impala LS, with the same driver, at about the same times each day.  My commute to work is about an hour each direction.  In Total for this year: I used 1,009 gallons of gas, drove 29,624 miles, and spent $2,171 on fuel.  Yea, this car has about 289,000 miles.

In November the Walmart Goodyear Viva 2 tires were replaced with new Douglas All Season Tires… a much smoother ride.  The rear bearings were also replaced in November (much quieter now), the A/C condenser in June, and oil every month (except for March and October), rear brakes were completely rebuilt (including emergency cables) in April.  Tire pressure is 30 PSI… that is critical for a good efficient ride.

 

Average miles per gallon (MPG) continues it sharp decline into the winter months. The gas prices are mostly stable, with a slight holiday inspired uptick.

 

Average MPG generally follows the average temperature for the month… with some deviation at the upper ends. Oct, Nov, Dec generally fall on the line, as expected.

Chart Gas Stats Chart updated for july

Fuel Tracking – June 2016 – Chart

June Gasoline Use and Statistics:

MPG and Gas Price as of June 2016

Since MPG is usually related to operating temperatures, with colder temperatures being less efficient for automobiles. We can see a nearly linear correlation between the average daily temperature and the car’s fuel efficiency (MPG). From this relation we see the MPG is 25.128 plus the temperature times 0.087.  Next month, the temperatures may increase. We can start see a slight tapering off, at temperatures above 55F. This might indicate a plateau, where temperature no longer has a major effect… More data is needed…

MPG vs Temperatuer Correlation as of June 2016

Table Data:

Distance driven (miles)2,764
Fuel used (gallons)89.739
Efficiency (MPG)30.80 ± 1.5
Fuel cost ($)$221.89
Average fuel cost per gallon ($/gal)$2.47
Carbon dioxide released (LBS)*1,586
CO2 efficiency (LBS/mile)0.574

*Assumes 10% ethanol for 17.68 lbs-CO2/gallon.

Fuel Tracking – May 2016

May Gasoline Use and Statistics:

Distance driven (miles)2,860
Fuel used (gallons)93.314
Efficiency (MPG)30.65 ± 1.1
Fuel cost ($)$211.81
Average fuel cost per gallon ($/gal)$2.27
Carbon dioxide released (LBS)*1,646
CO2 efficiency (LBS/mile)0.576

*Assumes 10% ethanol for 17.68 lbs-CO2/gallon.

Fuel Tracking – April 2016

April Gasoline Use and Statistics:

Distance driven (miles)2,782
Fuel used (gallons)94.996
Efficiency (MPG)27.9 ± 0.9
Fuel cost ($)$186.97
Average fuel cost per gallon ($/gal)$1.97
Carbon dioxide released (LBS)*1,679
CO2 efficiency (LBS/mile)0.603

*Assumes 10% ethanol for 17.68 lbs-CO2/gallon.

Fuel Tracking – December 2015

December Gasoline Use and Statistics:

Distance driven (miles)1,658
Fuel used (gallons)57.520
Efficiency (MPG)28.4 ± 0.5
Fuel cost ($)$103.50
Average fuel cost per gallon ($/gal)$1.80
Carbon dioxide released (LBS)*1,017
CO2 efficiency (LBS/mile)0.604

*Assumes 10% ethanol for 17.68 lbs-CO2/gallon.

Gas Mileage Tracking

Question: Commute to work 100 miles/day (total), how much do you spend on gas?

Answer: For a 2004 Chevy Impala with 28 ± 2 MPG, it is $0.08 ± 0.01 per highway mile.

 

This table shows the amount of gas, the purchase location, MPG and cost per mile for operating a 2004 Chevy Impala... most of these values are from highway driving.
DateGallons$/galLocationMilesMPG$/Mile
3/17/201511.4832.499Sheetz
33022.890.09
3/20/201511.7962.349BP27026.520.10
3/25/201511.3122.799Sheetz30027.080.11
3/30/201512.5572.599Sheetz34030.000.10
4/7/201513.1022.239Pilot39328.820.07
4/13/201511.972.349Petro34530.640.08
4/16/201512.5312.399BP38429.770.08
4/22/201512.2962.359Sheetz
36628.020.08
4/27/201511.5272.499Sheetz32330.180.09
4/30/201512.659
2.399BP38229.450.08
5/5/201512.4262.459Sheetz36631.580.08

 

By Vendor

Company Avg MPG
Sheetz 28.35
BP 28.58
Petro 27.16
Pilot 28.82