I have a 4x2 screw with the 4.6L, 2001. Sticker was 17 city 21 hwy. Highest I've ever seen was 19 mpg. I expected to be able to get the hwy mileage rating occassionally as I've often exceeded the highway rating with sedans on trips.

I'd be interested to know if any of you have the trip computer what the speed vs instantaneous gas mileage is on level ground.

I've posted this info below before but I think it is useful knowledge. I think that the trucks are set up to return optimal fuel economy around 45 mph to get the best EPA rating. This is consistent with the post above where he got 22mpg at 45 mph.

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I did a little digging around on the web and found the following info from the EPA's 1998 fuel economy guide. I found it interesting that the hwy driving speed average was 48 mpg. I also find it interesting that Ford seems to have 1 rating for all F150s with say a 4.6L, auto, 4x2. Shouldn't there be a difference between a reg cab short bed and a supercrew? Or am I wrong about the rating being the same. The explanation below doesn't say these tests are done in a wind tunnel. Are they?



How the Fuel Economy Estimates are Obtained
The fuel economy estimates are based on results of tests required by the U.S. Environmental Protection Agency (EPA). These tests are used to certify that vehicles meet the Federal emissions and fuel economy standards. Manufacturers test pre-production prototypes of the new vehicle models and submit the test results to EPA. EPA then confirms the accuracy of the figures provided by the manufacturers. The vehicles are driven by a professional driver under controlled laboratory conditions, on an instrument similar to a treadmill. These procedures ensure that each vehicle is tested under identical conditions; therefore, the results can be compared with confidence.

The test used to determine the city fuel economy estimate simulates a 7.5-mile, stop-and-go trip with an average speed of 20 miles per hour (mph). The trip takes 23 minutes and has 18 stops. About 18 percent of the time is spent idling, as in waiting at traffic lights or in rush hour traffic. Two kinds of engine starts are used--the cold start, which is similar to starting a car in the morning after it has been parked all night--and the hot start, similar to restarting a vehicle after it has been warmed up, driven and stopped for a short time.

The test to determine the highway fuel economy estimate represents a mixture of ?non-city? driving. Segments corresponding to different kinds of rural roads and interstate highways are included. The test simulates a 10-mile trip and averages 48 mph. The test is run from a hot start and has little idling time and no stops (except at the end of the test).

NOTE: To make the numbers in the Fuel Economy Guide more useful for consumers, EPA adjusts these laboratory test results to account for the difference between controlled laboratory conditions and actual driving on the road. The laboratory fuel economy results are adjusted downward to arrive at the estimates in this booklet and on the labels seen on new cars, light-duty trucks, and vans. The city estimate is lowered by 10 percent and the highway estimate by 22 percent from the laboratory test results. Experience has proven that these adjustments make the mileage estimates in this Guide correspond more closely to the actual fuel economy realized by the average driver.

 

Some of you guys are getting really great gas miles. My 2005 with 4x4 and roush supercharger averages around 13.5 in the city.

 

The stock engine delivers really good mileage if you drive smart. If I romp on the gas to keep up with Chevy's and Titans at the lights, my MPG goes down the toilet.

 

I have found in the short time that I have owned by 2007 5.4 SCREW, that I get pretty good mileage at 60MPH, anything more I have read is throwin $$$ away!

 

I've only had my 2007 for a few days, but I swear it has quite a bit more get-up-and-go than my 2005 did. For all intents and purposes, my 2005 was identical to my 2007. The 2007 sits a bit higher with the 20 inch rims (as compared to the 18's on the 2005), but the 2007 just seems to shift quicker. Too early to tell what the MPG will be on the new one.

 

Is it true that the MPG gets better as the engine wears in?