Quote:
Originally Posted by Piotrsko
Normally aspirated doesn't have the particulates problem as bad. Fuel injection droplet size does but solves other problems. A very high energy density fuel that is a gas and readily available is the holy grail. Dont wait for that
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IIRC, white diesel (diesel mixed with a certain percent of water) is shown to reduce both particulates and HC emissions at the expense of higher CO emissions. Water injection seems to help diesels get better fuel mileage too.