As Neste has been mentioned in the Wiki article and they also know the formula, I’m pretty sure they’ve tried it. It would still be fossil fuel though AND produce some CO2 (if your guess was that it produces much less CO2 than normal diesel) and wouldn’t fit to their strategy.
“Neste’s goal is to create significant value with renewable and circular economy solutions.”
Nesteen strategia | Neste
And:
Even if that produces much less CO2, it’s still not part of Neste’s strategy to be “completely CO2 neutral by 2035.”
Also let’s not forget what KalleH said:
Edit: Please let’s not discuss this any further (at least in here, the Neste thread), if you have more questions about this matter, please contact Neste to possibly get more answers from the professionals 