Gas Mileage?

[dogtired107]

Originally Posted by Akhunting Now that is wuss driving and has probably lead to more than one episode of road rage! Previously my '01 SCrew 5.4 was getting ~11-12 mpg with travel time split 50/30/20 (highway/city/off road). I just finished replacing plugs and doing some other maintenance and will be curious if I get an increase. HAHA! Don't mind being called a wuss driver. I am about due for a complete tune up, hopefully that will increase my mpg... maybe 18.5? Crosses fingers!

[darslariat1940x]

Been driving like GranMa until I see what the 2001 Screw with the 5.4 gets driving 31 miles R/T to work. Just put my first tank of 89 in it last Tuesday. I have scheduled for my mechanic to go over all the necessary items like smoothing out the idle at stops, rear drive fluid, plugs etc. Then I will check mileage using the same drive and report back to you all then on both. The truck had 203 plus on it when I bought it. I will be looikin to replace the driver seat which is the only thing that had to be covered with an OEM cover

[darslariat1940x]

My 2001 5.4 SCrew went through it's first tank of 89 octane since I bought it a week ago with 203,000plus on it. 343 surface and expressway and got 15.77 mpg. I am very happy since it won't be till Thursday before my mechanic gives her the once over.

[1972Formula400]

My 01 screw is getting 10-13 in town and 18-22 on the highway empty. Pulling a enclosed trailer with a project car inside I average 10-12

[InfernalCombustion]

My 01 Screw gets 14-16 in town and 17-18 on the Highway. No hurry and lots of cruise.
Dropping my speed from 68 to 60 gains me 0.5-0.7 mpg. It has stayed about the same since new.

[Spzz]

02/19/2012 - 346miles (highway) filled up 19.8 gal and avg. 17.4 mpg. I was driving 70 to 80 all the way home.

I have CAI, Lightning Full Exhaust, Lightning 18's rims, SCT programmer w/ tune.

[1997 lariat 4.6]

yea im in the Scab model with a '97 bone stock minus the gotts mod on the 4.6 and im getting an average of 11, and the rare 13.

[darslariat1940x]

My 2001 Screw after tune up and driving like GranPa, I was able on my third tank of 87 octane, 353 miles, 16.87mpg.204,339 on the odometer.

[trp408]

got a 2012 coming any day xlt 5.0 19-20 will be great

[Bluejay]

Just an update. I now have 19,700 on the truck and the mileage has stayed pretty well the same as when I first posted. I have never reset the Fuel Economy register and the truck has averaged 19.4 over the 19,700 miles. I did a test a couple of weeks ago, and stop and go driving in downtown Fort Worth, even going through some "stop and wait" construction, I averaged 17.5 for 63 miles. My absolute best so far is a trip down Interstate 45, cruise set at 68, perfect weather, 22.7. I use two tanks per week, and for a tank, I average anywhere from 19.1 to 20.5, depending on weather and how much in town driving there was. I don't rabbit start, but no sluggard either. I like to get up and go, so I am not really driving for mileage, and I will get up to 80 or so when passing on the highway. I do love to occasionally stomp it to hear that exhaust roar( I used to do a lot of drag racing).

The truck is completely stock, with 3.55s and has never had anything but Texaco, Chevron, Shell or QT in it, all 87 octane.

BTW, I keep a meticulous spreadsheet of every purchase, and the computer mileage is always dead on with the actual math. That is, except where I had to tell one station that thier pump I was using was off by over a gallon in 22 gallons. They got it recalibrated. LOL

[n1kko]

When I drive the way I like to drive, I get about 6. When I drive like I own a Prius, I get about 15-17 in the city.

[Akhunting]

Update to my previous mileage, I am still averaging about 11 after a mild tuneup (new plugs, filters, etc.) and a Gott's type mod. On my longest road trip to date (~200 miles) I averaged 14.8 mpg driving a bit like a grandpa (55 on an interstate with an 80 limit) because I had a coil over going out and could not accelerate very hard or maintain higher speeds.

Right now I figure I must be getting somewhere around 5-6mpg going up in the mtns, no real 4x4, just getting up and out. I need to figure out how to improve this mileage, I will not be able to go far one do much if I don't.

So you don't need to find my previous post; 2001 Screw with 120,000 on the clock of a 5.4. Stock except for the Gott's.

[Scarlet]

I'm sorry in advance for being a little long winded....I have a 2011 Supercrew Lariat 4x4 with the 6.2, max tow and 3.73's. I had factory skid plates installed. I have a Undercover hardshell tonnoue (spdell check) cover on the bed. A volant cold air intake (which I modified). and a complete Stainlessworks exhaust system (long tube headers, high flow cats, X-pipe, and true duals with chambered mufflers. And Cooper Discoverer AT3's (if you think that may make a differance).

50-55 mph, flat road good conditions, good weather, I can get 24 mpg. But usually average about 21-22 mpg.

60-65 mph (Usually 65, sometimes I hit 70), on my trips out to Keyser West Virginia (From northern Delaware-301 south over the bay bridge to 97 north, to100 north, to I70 west, to I68 west to Cumberland, MD, to 220/50 into Keyser), which is about a 265 mile trip, up and down mountains along the way (some elevations are as much as 1,400-1,500 feet above sea level) I average 20-21 mpg.

Around town running errands, short trips to post office, market, etc. usually avearge 13-14 mpg. If I take it reeeeeal easy I can average 15-16 mpg.

My Travel Trailer- 33ft. Keystone Bullet Premier which has a dry weight of about 5980 lbs.. This month will be a year that I've owned it! But My back as been so bad this past year that I even haven't used it yet. But, I've towed it several times back and forth from the dealer to have various things done to it. I bought it in Gambrill, MD.. It's all highway and about a 90-100 mile trip. This was back before I installed the cold air intake and the exhaust system. I was averaging 12-13 mpg while towing it. How do these numbers sound to you guys? I posted some pics of my information centers display in my albums section to back up some of the claims.

[Bluejay]

Those are fantastic numbers for the 6.2. Good to hear it's doing that well.

[benjineer]

'08 5.4 Lariat Screw 5.5'
Averaging about 16-16.5. 18 hwy.