i watched a top gear video last week and they did the new Audi A8 disel, they were able to do 800miles in ONE TANK OF GAS. about 45mpg total. THAT IS INSANE. Jeremy was giving some tips on how to be gas efficient.
1) aerodynamics: close all ur windows, reduce drag
2) turn off air conditioning: MAJOR gas eater
3) try not to listen to music, if must, listen to radio
4) keep RPM below 2000.
so i was driving from San francisco to Davis, about 80miles. i was attempting to drive below 2000rpm but it was impossible. Jeremy was doing about 50mph going under 2000rpm but i found that it was not possible to drive that slow with all the cars zooming by you.
on the other hand, i drove a 2001 c230 kompressor and i was holding 65-70mph using only 2000rpm. Overall, i think i had better fuel efficiency with the benz.
btw i was driving up to sacremento for the C-spot drive party. the C32 was AMAZING. ONLY one professional driver was good out of the few they had. the driver using the BLACK c32. The C-class cars were all pretty good. comparing to the ES, it's a lot funner to drive because it was very responsive. But of course it's not quite as smooth.