On 03/01/2012 14:28, Doctor Drivel wrote:
b) Recirculated, exhaust gas injection - this avoids having to run a
rich mixture at high power settings to preserve the catalytic converter.

AFAIK every mdern petrol engine has EGR.

Perhaps I should ask Bob Wilson (whose post you seem to have copied)
what's special about the Prius.

BTW for everyone this image

http://hiwaay.net/~bzwilson/prius/MPG_010.jpg

shows the distribution of MPG from some American users. Looks like less
than 10% of drivers of the _latest_ model get over 60MP(US)G.

Andy