We have a 1996 ford gulfstream ultra with no manual. It has a 460 engine, what is the fuel capacity and what can we expect for mpg?

quickest way is to take it to an auto professional shop for a quick look at it

probably around the 15 mpg mark if you have good driving habits and the vehicle is not too much overloaded or speeding
fuel economy is always in the driving habits and is always guess work
if a torque cam is fitted and the carburetor is adjusted to suit ( not to big -not too small==just right )
tyre pressures are correct and the possible fittment of an overdrive unit to the gear box (if manual ) to lower engine rpms when on the highway, you may get better economy

Gulfstream is not manufacturing motor homes any more, only travel trailers and fifth wheelers. You can download a copy of a 2010 generic RV owners manual for Gulfstream RVs at the link provided. http://www.gulfstreamcoach.com/towablelanding/2010editionmotorhome.pdf

If you have traced the fuel line to the fuel rail and checked all along the route there may not be one, either never installed or removed from prior owner(if there was one) ,you will have to go inline to check fuel pressure, remove fuel line supply and reattach with pressure gauge inline.

It's free. Woo hoo.

howdie ph your local part store and ask for gas tanks to fit Econoline van with 460 motor they will be the same capacities

on normal that trk should be around 6-7 gallons used per one hundred miles drove. i based that at 15 mpg. now that is also based on a V8 engine. now 1 gallon of gas is 3.78541178 liters which totals 12 galons of gas to 45.42494136 liters. This would mean that it took 12 gallons of gas to travel 100 miles which totals 8.3333333333 mpg. not as good as i would have thought. 8 miles per gallon (mpg) hell that engine must be a big block 460. If it is that big cubic inch i could understand but any other motor should do better mpg than 8.3. so i agree that is not normal, tune up, or look for fuel leak in the fuel supply or( feed ) line. From the tank to the motor. This must be a canadian truck yes? well hope for the best or trade that guzzler in for a new breed. stay warm!

1996 Acura TL.3.2:--- Standard engine:--- 3.2L 200 hp V6.-------------- Horsepower:-- 200 @ 5300 RPM------------ Torque lb-ft:-- 210 @ 4500 RPM.---------- Fuel Economy:---------- City:--19/mpg.------ highway:--24/mpg.------- Fuel capacity:---17.20.------------ ---------------------------- Keep updated if any more query.Thanks.

Dimensions Exterior Length: 146.1 in. Width: 62.4 in. Height: 53.1 in. Wheel Base: 89.2 in. Curb Weight: 1870 lbs. Interior Front Head Room: 37.8 in. Front Shoulder Room: 51.6 in. Rear Head Room: 36.5 in. Rear Shoulder Room: 50.5 in. Front Leg Room: 42.5 in. Rear Leg Room: 29.8 in. Luggage Capacity: 10.4 cu. ft. Maximum Seating: 4 Performance Data Performance Base Number of Cylinders: 4 Base Engine Size: 1.3 liters Base Engine Type: Inline 4 Horsepower: 100 hp Max Horsepower: 6500 rpm Torque: 83 ft-lbs. Max Torque: 5000 rpm Drive Type: FWD Fuel Data Fuel Fuel Tank Capacity: 10.6 gal. EPA Mileage Estimates: (City/Highway/Combined) Manual: 24 mpg / 32 mpg / 27 mpg
Range in Miles: Manual: 254.4 mi. / 339.2 mi. / 286.2 mi.

here you go, it in manual

https://www.fleet.ford.com/maintenance/owners_manuals/default.asp