car mileage
Post on 12-May-2015
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Factors Affecting Car Gas Mileage
Cody Kustrin
Weston McCollum
Purpose What Factors affect car mileage and to what
extent? Factors Examined
Drive Type Gas Type Weight
Data 122 Cars
70HPToyota Prius to the 285HP Chevy Suburban Drive type
Front (1) Rear (2) AWD (3)
Gas type Regular (1) Premium (2) Diesel (3)
Weight 2150 lb. Acura MDX to the 7270 lb. Ford Excursion
Drive Type
5 10 15 20 25 30 35 40 450
0.5
1
1.5
2
2.5
3
3.5
f(x) = − 0.0506697032418794 x + 2.46221162496618
MPG Line Fit Plot
Drive Type
Predicted Drive Type
Linear (Predicted Drive Type)MPG
Dri
ve T
ype
Analysis of Drive Type Regression Weakly Negative
Correlation, m=-0.0507
As drive type switches from Rear to Front MPG increases, AWD is the worse.
Rear wheel drive vehicles typically have more horsepower so the decrease in MPG is expected.
Drive Type
Average
Standard Deviation
One Standard Deviation
Front21.91463 4.581771 17.33-26.50
Rear18.35714 4.165238 14.19-22.52
AWD17.63636 2.838053 14.80-20.47
Fuel Type
5 10 15 20 25 30 35 40 450
0.5
1
1.5
2
2.5
3
3.5
f(x) = 0.013551346012293 x + 1.04176758875377
MPG Line Fit Plot
Fuel Type
Predicted Fuel Type
Linear (Predicted Fuel Type)MPG
Fuel Type
Analysis of Fuel Type Regression No Correlation
between Fuel Type and MPG, m= 0.0136
Premium Fuel is more efficient, but that is almost completely offset by the higher horsepower engines in most cars requiring premium.
Gas Type
Average
Standard Deviation
One Standard Deviation
Regular 20.51807 4.740488
15.78-25.26
Premium 20.56757 3.201914
17.37-23.77
Weight
5 10 15 20 25 30 35 40 450
1000
2000
3000
4000
5000
6000
7000
8000
f(x) = − 119.920683103598 x + 6098.72984441746
MPG Line Fit Plot
WeightPredicted WeightLinear (Predicted Weight)
MPG
Weig
ht
Analysis of Weight Regression Strong Negative Correlation between Weight
and MPG. M=-119.92 For every 119.92 lbs added to a vehicle it is
expected to lose about 1 MPG Takes more gas to pull heavier things.
Conclusions Drive Type has a moderate impact on fuel
economy, front is higher than both rear and AWD.
Fuel Type almost no difference between gas mileage of cars using regular compared to those using premium. Diesel has the best gas mileage but costs about
$1 more per gallon than regular
Conclusions Continued Weight has the biggest impact on fuel
economy other than horsepower. For every 120 pounds a car sheds it gains roughly 1 MPG Clean out your car on a regular basis to ensure
that you are getting the best gas mileage.
Any questions?
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