3 ms·
They want a high octane unleaded fuel, that also otherwise largely matches the existing fuel (viscosity, density, vapor pressure profile etc.). I don't specifi
by jabl 6y ago
They want a high octane unleaded fuel, that also otherwise largely matches the existing fuel (viscosity, density, vapor pressure profile etc.).
I don't specifically know what's wrong with xylene, but IIRC aromatics in general produce a lot of soot (PAH and other nasty carcinogens), which is why they've been steadily reducing the maximum allowable content in automotive gas.
- pfdietz 6y agoGiven that they are allowing lead in avgas I doubt a little soot would be showstopper.
- jabl 6y agoDepends. If there's so much soot it reduces time between engine overhauls, that might not be good. Then again, TEL causes shorter overhauls as well, so... Anyway, like I said, there's a boatload of other properties the fuel has to satisfy as well. If it were as simple as just switching to p-xylene, presumably they would have already gone down that route.