In a previous life I worked for a mining company with many division one of which was a tin mine.
We payed around US$ 14.0 million dollars to the ITC (International Tin Council - a consortium set up to investigate alternative uses for the metal) including the use of tin as an "fuel enhancer" (both as a catalyst and as an additive for petroleum companies to add to their base stocks).
Simply put it was money wasted.
It failed miserably as a catalyst and there were better alternatives for the petroluem companies to use which they were mainly producing anyway.
Hope this helps someone make a better informed decision.
Cheers , Pete.
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