What size gas tank would be in the rear of a 1995 Ford F150 4 X pickup truck?
A 1995 Ford F-150 4x4 could have a gas tank of either 26 gallons or 38 gallons, depending on the specific options chosen when it was manufactured. There's no way to know for certain without checking the vehicle's documentation (owner's manual or build sheet) or looking at the tank itself.