"The Model #71784, RDS, 51 Gallon Aux Fuel Tank & Toolbox Combo is a most convenient marriage. We're now traveling with a 34Ft. 5th wheel RV & it's most helpful to pass up some fueling stops due to inadequate manuvering room, out of order pumps, high prices, bad weather, long lines on holidays, etc.
Using a good quality [$40] electric fuel pump [gas or oil], attached to frame rail, to transfer contents into main tank via "tee" connection available from Northern Tool. Transfer flow is low, but 30 minutes on a long road trip no big deal.
Pro's:
--The bright finish reflects most heat from the sun & stays cool [if clean]
--tool box is perfect for tow strap, flares, road hazard kit, socket & wrench set, etc
--fits a 6.5Ft. truck bed nicely, leaving storage room on each side to accomodate spare bottles & jugs of antifreeeze, oil, fuel treatment, windshield cleaner, large wheel chocks, etc.
--top is just under the bed rails, thus looks neat & doesn't protrude.
--has dual release handles, so can be opened from either side of truck
Con's:
--the fuel nozzel does not have a mating oval hole in the tank, thus only automotive size nozzels fit. A distinct disadvantage at truck stops, where two nozzels are available.
--the latch assy. is not robust; loosens after some miles, thus latches unpredictably at times if adjustment nut/bolts are not checked for tightness
----fits a Dodge Ram 6.5Ft. truck bed between the wheel wells, leaving room on each side. If this design were a few inches shallower [frt to bk], it would hold nearly 90 gallons instead of 50 gallons. This is more important than incidental storage if your primary goal was to carry additional fuel."
What is your level of technical expertise? Home Handyman