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 |