[curtis73]

diesel, kerosene, jet fuel, and fuel oil are very similar in properties. For the most part, you could put any of them in a diesel engine and it would run. Modifications to the engine would be required for it to run well and for long term use.

Kerosene and Jet fuel will eat rubber pretty quickly, and kero will also not flow well through paper fuel filters. Heating oil is a little less volatile and more viscous.

I would assume that the lead could be removed. Its tetraethyl lead and I believe its a powder that gets dissolved in some liquid before being added. If you found something that reacted with the Pb it might precipitate out. Of course, if you take out the lead, you remove its primary source of its octane rating. You might be able to supplement it with toluene, but I think its not going to be a very viable alternative fuel when you're done