standards

Math of Toughening MPG Standards

With the recent government mandated fuel economy standards, there has been a lot of confusion on what is cost-effective, and how much money will be saved with various standards will across the fleet of vehicles. Here is some tables that will help you understand what various improvements on fuel economy really mean.

MPG Improvements.

MPG 10% 20% 30% 40% 50%
10 11 12 13 14 15
15 16.5 18 19.5 21 22.5
20 22 24 26 28 30
25 27.5 30 32.5 35 37.5
30 33 36 39 42 45
35 38.5 42 45.5 49 52.5
40 44 48 52 56 60
50 55 60 65 70 75

Fuel Savings, gallons per 100k mile.

MPG 10% 20% 30% 40% 50%
10 909 1,667 2,308 2,857 3,333
15 606 1,111 1,538 1,905 2,222
20 455 833 1,154 1,429 1,667
25 364 667 923 1,143 1,333
30 303 556 769 952 1,111
35 260 476 659 816 952
40 227 417 577 714 833
50 182 333 462 571 667

Money Saved, per 100k mile @ $3.50/gallon fuel.

MPG 10% 20% 30% 40% 50%
10 $3,182 $5,833 $8,077 $10,000 $11,667
15 $2,121 $3,889 $5,385 $6,667 $7,778
20 $1,591 $2,917 $4,038 $5,000 $5,833
25 $1,273 $2,333 $3,231 $4,000 $4,667
30 $1,061 $1,944 $2,692 $3,333 $3,889
35 $909 $1,667 $2,308 $2,857 $3,333
40 $795 $1,458 $2,019 $2,500 $2,917
50 $636 $1,167 $1,615 $2,000 $2,333

Maximum Cost for 2:1 Payback.

MPG 10% 20% 30% 40% 50%
10 $1,591 $2,917 $4,038 $5,000 $5,833
15 $1,061 $1,944 $2,692 $3,333 $3,889
20 $795 $1,458 $2,019 $2,500 $2,917
25 $636 $1,167 $1,615 $2,000 $2,333
30 $530 $972 $1,346 $1,667 $1,944
35 $455 $833 $1,154 $1,429 $1,667
40 $398 $729 $1,010 $1,250 $1,458
50 $318 $583 $808 $1,000 $1,167