Anyone know what it is? I'm trying to calculate fuel economy / useage #'s as a guideline.
thanks
soundguy
Trying to figure fuel economy on a truck is easier done starting with a full tank and at the next refill calculate the used amount of fuel to the number of miles driven since the last fill-up. Calculations base on a fuel gauge reading are bound to leave you disappointed or mislead, since few fuel tanks gauges are calibrated to read exactly the correct amount in a tank at any given time. Guidelines for fuel available is probably more of a correct name.
I drive different trucks most every night and drive far enough to empty the tanks each night, or close to it. Depending on how much fuel the previous user left me, and which truck it is will determine just how far I can go on a guage read amount. Quarter tank on one truck will get me to Tallahassee, whereas another one won't make it to Lee, so I have to be aware of the characteristics of each fuel gauge. Most of the trucks average just about the same mpg, when figured on amount used, but other than that, it is a crapshoot.
One truck stays on full for about 500 miles, then drops off like a lead ballon. One driver always tells me it has "plenty" of fuel to make my trip, which requires about 3/4 of a tank to do. I usually make it to Marianna before needing to refill his truck, since he gets to start with a full tank (I try to always fill it up for them, hoping they will recipocate for me) Some understand, some don't on the fueling when multiple people use the same truck.
Anyway, figure the fuel consumption on fuel used, and if you need to know how far you can drive on a tank, then find out what size tank it is, but in reality I would just run the truck till the gauge says "break out your wallet" because that is how far you would drive anyway. Very few people will continue to drive past a certain point "on the gauge". My "certain point" is when the needle gets to E, my wife is when the low fuel light comes on, whereas my MIL goes balistic when it gets below 3/4 of a tank. (uses a quarter before filling it up again). That point of reference changes as your familiarity with the surroundings does. Put you on a long trip where your not exactly sure where the fuel stops are, and your comfort level with the fuel gauge will change to a higher reading, if your one like me who uses the E for a reminder to get some fuel.
The proper way for semi truck drivers to check fuel level is not the gauge, but to remove the cap on the tank and determine with a flashlight, since running one of these durn things out of fuel can be expensive (several hundred dollars to have somebody do a road service to bring enough fuel and to get you started again). That usually won't work on a factory tank on a F350, but will on your aux tank.
David from jax