The U.S. Environmental Protection Agency has released its new system of calculating a vehicle’s estimated MPG, taking into consideration faster speeds/acceleration, air conditioning and colder outside temperatures.
Lexus, like every carmaker, has seen their gas mileage drop, here’s a handy chart displaying the before & afters of the current lineup, along with their estimated yearly cost and greenhouse emissions:
| Model | New Estimated MPG (City/Highway) | Old Estimated MPG (City/Highway) | Annual Fuel Cost | Greenhouse Emissions (tons/year) |
| 2008 LS 600h | 20/22 | 22/24 | $2342 | 8.7 |
| 2007 LS 460 | 17/25 | 19/27 | $2460 | 9.2 |
| 2007 LS 460 L | 16/24 | 18/27 | $2588 | 9.6 |
| 2007 SC 430 | 16/23 | 18/25 | $2588 | 9.6 |
| 2007 GS 350 | 19/26 | 21/29 | $2239 | 8.3 |
| 2007 GS 350 AWD | 18/25 | 20/27 | $2460 | 9.2 |
| 2007 GS 430 | 16/23 | 18/25 | $2588 | 9.6 |
| 2007 GS 450h | 22/25 | 25/28 | $2140 | 8.0 |
| 2007 ES 350 | 19/27 | 21/30 | $2239 | 8.3 |
| 2007 IS 250 Auto | 21/29 | 24/32 | $2052 | 7.7 |
| 2007 IS 250 Manual | 18/26 | 20/28 | $2342 | 8.7 |
| 2007 IS 250 AWD | 20/26 | 22/28 | $2239 | 8.3 |
| 2007 IS 350 | 19/25 | 21/28 | $2342 | 8.7 |
| 2008 RX 350 2WD | 18/23 | 20/25 | $2460 | 9.2 |
| 2008 RX 350 4WD | 17/22 | 19/24 | $2588 | 9.6 |
| 2007 RX 400h 2WD | 28/25 | 32/27 | $1894 | 7.1 |
| 2007 GX 470 | 14/18 | 15/19 | $3282 | 12.2 |
| 2007 LX 470 | 12/15 | 13/17 | $3783 | 14.1 |