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Old 03-20-2012, 04:33 PM
pcbrew pcbrew is offline
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Originally Posted by tarf View Post
I'm curious as to how this reduction in MPG in the N20 engine in the various models will affect BMW's compliance with the "required fleet average" target under the CAFE rules. I thought that they had to get to an average of 37.3 MPG by 2016. Will this throw a monkey wrench into BMW's plans to achieve the target? Since the N20 is or will be in the 328, 528, Z4 and X3, I'm sure that this engine constitutes a major factor in BMW's plans to meet the MPG standard. Could this reduction in MPG lead to other actions by BMW in the future to meet the targets such as trying to sell more 128's or giving incentives to customers to buy more fuel efficient engines (more 528's and less 550's)?
It's hard to say. They could very well raise the price of the larger engined models to shift the numbers to the more efficient models. But, there are a lot of factors that go into CAFE. Here are links to 2 C&D articles. The first, from May, 2010 notes that the CAFE score is based on the old, un-adjusted EPA score and the OLD 328i (18/28 mpg) already met the 27.5 standard for 2016.

There are lots of complexities, from credits you can carry forward to the fact that the numbers are based on CO2 emissions and some of the gain will come from more environmentally friendly AC systems. Also factored in is the cars' footprint, which may have had something to do with the wheelbase stretch and increase in track of the F30.

The manufacturers will also get mpg credits for adopting efficient technologies that often show no effect on the official test cycles. These include active grille shutters (F10), electric heat pumps, stop-start systems (coming across BMW lineup), high-efficiency lights, and solar roof panels. The credit for such items could amount to about 3 mpg if several are used or even more if a manufacturer provides data to justify it.

'02 E46 330i 5MT (ED Sept '02) - SOLD
'12 F30 335i Sport 6MT (ED May '12)
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