Here is an interesting article about the new hybrid bus running on batteries and a turbine diesel engine. It was reported that it gives 7 mpg, seems pretty low to me. Do anyone knows why the new bus uses a turbine diesel engine? Is it suppose to be more efficient?
http://cityroom.blogs.nytimes.com/2007/10/11/the-turbine-on-the-bus-goes-purr-purr-purr/index.html

It's not a diesel engine, it's a turbine using diesel as fuel.

great article. equally amazed n.y.c. has almost a quarter of its buses, diesel-hybrid..and the overall average mpg is only 3.5

If you can build a diesel to run on JP-8, you can get a turbine running on diesel. 7mpg isn't bad if it carries 50 people... I don't know any 50mpg car that can seat 7.

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1992 300D 2.5T 249k - Parked with a bad transmission
1981 300SD 142k - Daily driver

JP8, Jet A1, #1 diesel, and kerosene are pretty much the same, when it comes to viscosity and BTU content. The Jet fuels are lower in sulphur content and always have been ( sulphur does really bad things to the alloys turbine wheels are made of). We haven't been able to confirm lubricity between them though I use Jet A1 in my 350D, throw in some Marvel Mystery oil (regardles of the test results I saw the other night on the forum) and Power Services Diesel Supplement. The sump fuel is free and there is enough to keep a couple of us in fuel to cover our needs. I don't know about using turbine engines to power municipal vehicles, I'd think this is where Fuel Cell technology needs to be addressed. Besides, turbine engines are really hard on the ears.