Stock Fuel Tank Capacity?
- Thread starter yabanja
- Start date
yabanja
Explorer
I actually tipped the truck when filling by driving on blocks which resulted in 3 extra gallons. I drove it straight away before the fuel could heat up and expand too much. It still leaked a bit out of the breather. My new tank has no provision for air space. Guess I'll have to install a breather tank. The original tank says don't fill over 95%. I assume a breather tank with 5 percent capacity of the main is necessary.
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SkiFreak
Crazy Person
Diesel systems are rarely every pressurised, like they are in many petrol based cars, so an expansion tank is not really necessary. As long as the tank can breathe to allow for expansion and contraction there should not be an issue.
Like with diff, gearbox and transfer case breathers, just lift the fuel breather high enough so that there is not an issue. The hose from the tank to the breather will do the same job as an expansion tank. One thing to be mindful of here is to not have any point in the breather hose where fuel can pool, as this will block free air flow.
Like with diff, gearbox and transfer case breathers, just lift the fuel breather high enough so that there is not an issue. The hose from the tank to the breather will do the same job as an expansion tank. One thing to be mindful of here is to not have any point in the breather hose where fuel can pool, as this will block free air flow.
Larrylandcruiser
Member
Hi sean great option for a tank,where did you buy the tank? Is it oem from isuzu? Cheers
mog
Kodiak Buckaroo
In searching for rectangle tanks that use the space more efficiently then the stock round tank, don't limit yourself to just truck tanks. I found a pair of aluminum 'boat' fuel tanks locally that were size perfectly for my Fuso, hold 45 gallons each, with crossover fillers so you can fill both tanks from either side (I am mount them on opposite sides for weight distribution and protection) and they were only $100 for the pair.
A rear mounted FE140 tank (between the frame rails) will only take about 24-26 gallons with the fuel gauge on or near Empty. Mine has a filler neck that comes out and up, so it is well above the top of the tank. It is filled until there is fuel in the filler neck. Using this fill up data, I see anywhere between 16 - 20 MPG on a regular basis in mixed driving. That excludes fast freeway travel for extended periods. The rear mounted tank, while not the best for rear departure angle, is much easier to fill than the side tanks IMO.
skippythedog
Observer
I just got my 2007 fg. So far, I've put in a max of 27 gallons which took me 420 miles of mixed driving (15.55mpg) (truck weight 8600 lbs). My indicator was a half needle width above the empty mark. I used to drive a fuel tanker so I'm a bit of a fanatic about calculating ullage, capacities and usable/unusable fuel etc..... I will probably measure the tank length/circumference and make a tank chart and then carry a shortened heating oil tank dipstick in the event of gauge failure and to determine how much fuel is unusable. If Mitsu followed standard practices, the 33 gallons is the rated capacity to the top of the filler. Any voids above that (probably about 10%) is to cover potential expansion (ullage) of the fuel. I'm thinking (hoping) that perhaps only 2-3 gallons might be unusable. As a side note, I just started running the Stanadyne diesel additive. Previous experience has rewarded me with about an 8% increase in fuel range and (according to the injector/ injection pump rebuilder that recommended it) much longer injector and pump life. The increase in mileage more than paid for the additive.
UPDATE 8/17/16........put 29 gallons even in, for 460 miles (15.8mpg on an even 3-way split of freeway, city, and 45mph secondary roads) Did not stick the tank, fuel indicator needle centered on the E mark.
UPDATE 8/17/16........put 29 gallons even in, for 460 miles (15.8mpg on an even 3-way split of freeway, city, and 45mph secondary roads) Did not stick the tank, fuel indicator needle centered on the E mark.
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westyss
Explorer
I ran out of fuel a while back after my newly installed pickup tube for the espar didn't allow the fuel level float to go down all the way and I was pretty surprised at how little fuel remained in the tank, I did not measure it but would guess no more than two gallons but maybe even less that that.