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The USS Orleck is a WWII era Gearing class destroyer that served in Korea and Vietnam and into the 1980s before being retired. She then served with the Turkish Navy and was returned to the United States for use a museum ship. She was recently overhauled and will soon be open for tours in Jacksonville, Florida.
Since starting the fuel log in late 2017, we've not driven the truck continuously on a tank of gasoline such as when on a road trip. There are always stops involved and long periods of idling. This one wasn't perfect either but it's a start!
Knowing the Orleck was docked right in front of the Hyatt in Jacksonville, I had it in my head to make a midnight run to see her and run the test while my sleep schedule was out of whack again. This allowed me to basically pull right up next to the ship without leaving the truck, which is why this fat man even considered the run!
The truck was refueled earlier in the day and used to pick up groceries and then around 1 AM my youngest daughter and I set off for Jax. Immediately after refueling, the truck was getting 21+ mpg at 66 mph. Early on in the trip she delivered 20 mpg at 65 mph, 18.5 mpg at 70 mph and 17.4 mpg at 75 mph after nine miles for each.
We stopped at a rest area then later at Buc-ees in Daytona then on the way back grabbed breakfast at Bojangles in Saint Augustine, all the while never shutting off the engine. The truck was burning 93 octane Chevron with no alcohol detected in it. Fuel trims were zero for the most part at speed but jumped to -13 and -17 when idling, something clearly is amiss again.
That tank of gas lasted about 9 and a half hours for 515.2 miles. We burned 27.2 gallons for 18.9 mpg with an average speed for that tank of 55.4 mph. Could have gone a little further with 4 gallons of gas left aboard! Cruise control was set for 67 mph.
The only other tankful of fuel to average over 55 mph was a run we made on E85 once that delivered 13.7 mpg on the KO2 tires. The truck is now wearing Michelin Defenders.
Jaime and I had a great trip, she was an excellent DJ and even put up with my oddball music requests!