Originally Posted by lucid
Didn't EPA modify the US test significantly for 2008, which resulted in the Prius' rating to go down to 48 from 62 or something to that effect? My understanding is that the new test results in the rating to drop for most cars and not just for the Prius.
Yes, I noted that in my post. The New EPA ratings will be translated to the old figures for the purposes of the GGT. The 335i went from 19/28 to 17/26 under the new tests. For a model like the M3, which was not tested previously, they must have formulas to do the conversion.