Fuel having a high ´natural´ cetane number obtained through high energy paraffin content may provide better fuel mileage than lower energy fuel or fuel with poor natural burning characteristics plus a cetane improver, if ambient temperatures are adequate to prevent gelling of the high paraffin fuel.
Then the 1973 oil embargo hit, fuel mileage became the number-one issue, and the steam car projects of the time were ´Dead On Arrival´.
While SUVs have become more fuel-efficient, explains Champion, the greater number on the road has lowered the average fuel mileage.
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