The Toyota D-4D engines are *very* good. I drove a 150BHP Avensis D4-D over 150 miles, at average 56mph, with air-con on for about 30 mins, and with a cold start through town at the beginning, and got 91MPG UK (=75.8MPG US). Most people driving the car other than me tend to get 45MPG (UK)
The only problem is, being modern engines, they can't run veg oil (which is practically zero emissions).
__________________ Team GasMisers5 - #1 for first three rounds of the original GS Fuel Economy Challenge
Miles displaced by e-bike since 1 Jan 2008: 62.6 (0 kWh used)
They can, but it's risky. Most modern diesels have very high pressure fuel injection systems, so in order to use the oil, it has to be much warmer than it has to be with older idi systems. Then there's the potential for the combusted products to gum up the rings, which isn't as much of a problem in an idi since combustion occurs in a prechamber. All in all it's safer/easier/probably cheaper to turn oil into biodiesel, at least for tdis.
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.