Is there any insight 1 in Scotland ? At what price ?
I can barely imagine any 1000L diesel being more ecological than your gasoline car. Today no diesel is as clean as a 2000 prius or a 2000 insight... It all depends on your ecological sensibility and the ecological problem you want to solve :
- lower CO2 emissions/dinosaur juice consumption for cooler atmosphere in 50 years
- lower pollutants (particles/NOX) emissions for better air nowadays
CO2 can be lowered by hypermiling/ecomodding
You can emit a lot more pollutants by racing your car, but hypermiling/ecomodding will not have as much impact than for consumption.
Now if this is about saving money only then a spreadsheet is your best friend, depending also on your mechanical skills.
Denis, saving money one tank at a time to buy a Prius that will generate much less pollutants but cost a little more per distance.