This is what it appears to be based on: https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_pro

This is what it appears to be based on: https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_proces... So basically hydrocarbons of various molecular weights which gasoline or diesel also consist of, but one article mentioned there were only a dozen or two major components, rather than the hundreds of different hydrocarbons in each of the mainstream motoring fuels which have been refined from crude oil. This could be some pretty clean stuff. The C10 to C20 straight chain hydrocarbons mentioned in the Wikipedia entry would be within the diesel range, and identical to the same straight-chain components found naturally within crude oil. Synthetically this process would be expected to yield much less of the branched-chain hydrocarbons found in petroleum-based diesel, and likely low to insignificant _aromatic hydrocarbons_ like the benzene, toluene, & xylene which are the major ones in the gasoline range. I have made laboratory blends of these materials (still do) for decades as NIST-traceable reference materials for comparison to petroleum materials. Gasoline engines need the next lighter fraction of refined crude than diesels use, plus straight chains are much lower in antiknock rating (R+M/2) so are not acceptable for gasoline engines. I imagine there has been some successful effort by Porsche/Siemens where some branched-chain hydrocarbons lighter than C10 can be preferentially yielded to substitute for petrol. Diesel engines are supposed to _knock_ but not gasoline engines. Remains to be seen, I'm sure to be part of the discussion on the ASTM Committee when it comes to specifications & testing before this could become mainstream. It's an alternative fuel so I'll probably get some of the earliest samples.