My truck only gets @ 11 mpg on the highway. That seems awful low to me. Does anyone know if this is right? If not do you have any ideas?

 

What size motor do you have? I have a 351 and 11mpg would be a blessing! I get 8-10.
Adam.

 

I have a 300. Seems as though it should be better.

 

I have an 88 F-150 4X4 with the 302 and the 5-speed and I get 12mpg. I guess that sucks, but I don't know what to fix to improve the mileage since the trucks runs perfect for having 120K miles on her.

Any suggestions would be appreciated.

Later.
Randy

 

is it a standard or auto? standards always get better gas milage.believe it or not ford truck are better than chevies on gas milage too.

 

i have a 90 bronco with a 351........i'm pulling about 11.5 miles per gallon and that's with over sized tires. Average on these(broncos, f series) is about 12 mpg.........maybe stretching to 13 at best!! I just went through finding this info out myself so that's why i know. Hope it helps.

 

Sounds a little low. My 93 got 13 in town and 16 on the hwy with the 5spd. A friend has a 84 f-250 with the 300 and gets 13.

 

It is an automatic. I'm comparing it to my 88 blazer with a 350 automatic 4x4 and that gets 15 around town

 

I have a 89 302/Aod 4x4 3.55 ls gears. I get about 14 on the hiway w/tailgate down

 

I have a 1990 f 150 302(5.0L) with about 180,000 kilemeters (90,000 miles) and I get from 15-18 miles per gallon on the highway, guess I should quit complainig.
And thats down from the 20 MPG that I use to get.

 

I've owned four Fords, 68 & 69 F100s and 81 and 90 F150s. All were carburated except the 90, and all had the 300 I-6 except the 69 (360 V8). Anytime the mileage went below 15 (town and highway), I knew something needed attention.
This boils down to checking 3 things, spark-ignition system, air-emissions system, and fuel system. Start by checking all your spark plug wires and coil wire for spark, then check and clean your distributor cap and rotor. Then check your pcv and EGR valves and air filter. On the fuel system, check fuel filter and fuel pump pressure. On fuel injected vehicles check fuel pump pressure at the fuel rail (which supplies fuel injectors). You can buy a gauge that reads up to 100 psi and check it yourself or pay about $20 for a shop to check it. There is a fuel pressure regulator on the fuel rail that can cause your mileage to go down (from slightly to drastically) if it is failing or completely shot. Mine recently did this (90 F150, 300 I6) and a new regulator ($38.50) brought it back up from 10 mpg to 15-17 in town and 19 highway. You also need to check the reference voltage and resistance on the following sensors on a fuel injected vehicle: Engine Coolant Temperature (ECT), Air Charge Temperature (ACT), Oxygen Sensor (O2), Throttle Position Sensor (TPS), and Manifold Absolute Pressure (MAP) or Mass Air Flow (MAF, on newer engines). You can easily check sensors yourself with a multi-meter from the parts store (cost runs from $15 to $50, depending on how fancy you want) and about 2 hours under the hood. A good Haynes or Helms manual will help a good bit, too ($15 to $20). Also a good idea to have your CAT checked at an exhaust shop (should be free). If your CAT is shot, which happens from prolonged running rich, it can screw up engine performance and mileage. You'll know if your engine is running rich if you've got sooty black plugs and tailpipe (not oil-fouled black, put powdery black soot). Learn how to run and engine self-test and read error codes and maintenance will be a lot easier. This web site tells all about engine self-tests and error codes:
<a href="http://dalidesign.com/hbook/eectest.html">http://dalidesign.com/hbook/eectest.html</a>
Work your way through the 3-system diagnosis, replacing or cleaning what needs attention, and you should get some mileage boost at not much cost.