Manual for my 97 XJ says I have a 20 gallon fuel tank. Yesterday I put in 21 1/2 gallons on a empty tank. I'm now assuming that I have a 22 gallon tank. I have the standard fuel gage (no low fuel lamp). This gage has the "shaded" area next to the E mark. Twice I've gone past that mark and took the needle farther than I thought I could. Bottom line, I guess I shouldn't really mess around and let it get that low, but I am curious on the size of the tank and how much gas is in the tank when in the shaded area. (on my honda that I used to have I knew exactly WHEN the tank was almost empty.