Originally posted by "obituary"
dont wanta change the topic, but the higher the octane the cleaner the burn - less emissions......but dot or epa say diesal is a cleaner burnning fuel than gas.....how can that be if gas is 93 oct when diesal is something like 65 oct?
Wrong on both counts. Octane doesn't really effect the emissions of the fuel (assuming that we are not looking at some of the things that have been used to adjust octane like lead) and diesel is far from a clean buring fuel, though the pollutants it creates are very different from those produced by gasoline.
Perhaps what you are referring to are some of the new low sulphur diesel fuels and the fact that a diesel can have low emissions due to the fact that all diesels burn lean by design and have a high BSFC.