All;

As a rule, will the winter blends of diesel result in a reduction in fuel mileage? Lately my California-spec '85 300TD seems to go through a tankful in far less time (now 310 miles or so and I start watching the gauge much more closely, before it seemed 340 was the norm) than previous, and before I start looking for deeper causes, would like to rule out fuel as a possible culprit.

A search of the forum ID'd several posts related to winter diesel blends, and resistance to gelling, but little on the impact to fuel economy.

Thanks in advance,
Dave