I've been getting a whopping 13 miles a gallon in my 03 XLT 4x4 Ranger. Was wondering if this is normal. If so. Anytips to improve it? Gas is getting more costly than I'd like. Also it is BONE STOCK

 

All you can do is textbook stuff.

Do you do any work on vehicles yourself? Do you have any tools?

DRIVING: Drive easily. ..as if there was an egg between your foot and gas pedal.
Look down the street and anticipate red lights. Observe other cars slowing ahead of you and let off the gas well ahead of applying the brakes.
Keep the speed down on highways.
Try filling your tires to 36 psi.
Synthetic lubricants contribute a small bit to improved mileage.
Ancient plugs and wires can effect mileage.
Old, dull oxygen sensors bite into mileage.
Old MAF sensors bite into mileage.
Dirty fuel injectors bite into mileage. Try running a few locally driven tankfulls of fuel treated with Techron Concentrate.
Engine air filter over 50K miles old?

 

13 mpg is not normal. I get better than that when I tow my race car. I typically get 15 or better mpg around town with 4.56 gears and 31" tires. I used to get 16 with 4.10 gears and 31" tires. I have replaced my O2 sensors one time and clean the MAF occasionally. My spark plugs are replaced at 80 to 100K intervals depending on how they look. Those are the kind of thing that drop your mileage to what you are getting unless you drive all the time with the accelerator pedal on the floor.

I have also replaced the coil pack and spark plug wires but when they get bad it usually has symptoms like misfiring.

 

One thing to keep in Mind > these trucks are heavy and not good on gas at all.. Whether you get 11 or 15 MPG s not really good on gas. We bought the trucks for their utility. And they are relatively cheap. If you want good gas mileage you might have to switch to a prius. I m not trying to upset you but the newer f150 s probably do way better on gas.

thanks
Tom

 

Welcome to the forum

BONE STOCK means tires are still 29" diameter right?

Larger tires LOWER the ODOMETER miles, so odometer can not be used to calculate accurate MPG, just FYI

No, 13mpg is not normal, it would mean engine is running too Rich or you have a neighborhood kid with a siphon hose, lol

Pull a few spark plugs and see what the tips tell you about rich or lean burns

You could even have a small leak at one of the fuel line connections, top of tank, fuel filter, or at the engine
You can use a fuel pressure gauge to see if you are losing pressure after key is off, it should hold above 35psi, running pressure is 50-55psi