Somewhat.

We own two SUV's and a sedan.

The SUV's:
One 2000 Ford Explorer we are trying to sell. It gets 16-20 mpg. A grocery getter but works well in snow, etc.

2000 Nissan Xterra that has been used for off roading. Not sellable. Gets 12-14 mpg on highway due to being lifted and carrying a ton of extra steel. Offroading gets it maybe 10 mpg. Keeping as...well, only a few people would want its well abused body <img src="/forums/images/graemlins/tongue.gif" alt="" />

1993 Mercedes Benz Diesel sedan. It gets 32-40+mpg depending on weather and what grade fuel we use. We run B5 to B20 Biodiesel in it and it likes that a lot better than dino diesel. On highway we top 40 mpg. She is a huge sedan as well - no economy car here - she sits 5 real sized adults with a ton of gear. But! She is not good in snow or cold weather so we drive the trucks during the winter when hiking up in yonder foothills.

The Benz allows us to travel still and it is actually getting easier to find B99 Bio as well. We are considering putting the conversion in as well this year so we can run bio alongside WVO "fuel" at the same time. With this we could drive to Montana and back on ONE set of tanks of fuel. Currently we fuel up around the 500 mile mark to be sure. I love our Benz more than any car I have driven. I will NOT go back to a gasoline car again. Diesel is the way for me.
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