Last summer, we travelled over 9000 miles on our way from Sacramento to the TDR Nationals & return via Maine, Quebec and points north. Averaged out to 22. 7 mpg. Average driving speed in 5th OD (Gear Vendors) was 70-75.
When hauling my 25 foot sailboat which weighs 9200 pounds with trailer, we averaged 13. 6 from Sacramento to Anacortes, Washington and return.
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'93 D-250 Club Cab, Emerald Green & Gold, 5-speed w Gear Vendors OD, 77K , ASC Sun Roof, Horton Fan, Transfer-Flo 45 gal tank/toolbox combo