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Old 01-20-2012, 09:53 PM   #11
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I always heard that toppers and bed covers help mpg's... any truth to that?
I dont know what you mean by toppers but bed covers help but if you are only getting one to get better mpg it isnt worth the money it will take way toooooo long to get your money back.. A tuner (custom tune is best), Gotts mod(its a mod to the factory intake) are the two best for mpg gains
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Old 01-20-2012, 09:56 PM   #12
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Me too...
5.4 fx4 .. supercap... When I had mine... I remember getting around 19 driving from Chicago to va beach
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Old 01-20-2012, 09:58 PM   #13
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5.4 fx4 .. supercap... When I had mine... I remember getting around 19 driving from Chicago to va beach
Does this sound right?
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Old 01-20-2012, 10:00 PM   #14
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Thanks for the info. How big of a difference will tuning make on a new engine though?
Idk how the new engines are with them but my 07 4.6L gets 13-15 in city, 20-21.5 at 70, and 16-18 at 70+.... winter mpgs are worse though. I have the gotts mod done to mine and I also have a gryphon tuner(Edge tuner with custom tunes from power hungry performance)
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Old 01-20-2012, 10:06 PM   #15
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Tried the deal with keeping the RPMS under 2000 and it was a bust. Actually lost about 1 mpg (13.5>12.5) My truck does best when staying under about 2300. Never figured this out but I finally read somewhere that when you keep RPMs so low that it keep the tranny in the lower gear for a really long time causing more resistance or something to that effect. Stop light to stop light it 2000 RPMs is probably good. Think it really makes sense on the highway to use a higher RPM when accelerating. Instead of taking a half mile to get to 70 just gas it a little more get to speed and let overdrive and cruise do their job.

Guess what I'm trying to say is don't take anything as gospel and play around with these ideas. Some people driving conditions and needs are different so what works for one may not work for all.

Did just do the gotts mod. Haven't been able to check mileage yet (no money to do consecutive fill-ups at the moment. I hate the holidays) but I feel it has improved. Gas gauge just seems to move a little slower. We'll see.
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Old 01-21-2012, 02:05 AM   #16
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I have an 02 4.2L F150 with the 5-spd. Its sitting on LT265/75-16's and makes about 15 mpg on the highway. A friend of min has an 02 4.6L with the 4-spd. He makes 16 mpg on 255/70-16's but he is an extended cab where I'm a single cab. Both rear end gears are 3.55. Look at how the transmissions are geared, the auto has gears more evenly spaced, and has a .69:1 OD gear where the 5-spd's OD gear is .8:1.With mine, I'm running 2200 rpm to keep up 70...

Here's another thing to consider. My dad has an 06 Megacab with a 5.9 Cummins and 4.10 rear gears. Sitting on 285/70-17's. His has the HD 4spd transmission which has a .68:1 OD gear. Running 70 mph, he's running at 1900 rpm...55mph he's at 1500 rpm (60 mph is 1600 rpm, peak torque). Needless to say, he has me beat of fuel mileage by quite a bit. In fact, my highway mileage doesn't even come close to his city mileage.

Last edited by bobkyle2; 01-26-2012 at 04:56 AM.
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Old 01-22-2012, 01:07 AM   #17
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MAGIC!!!!

Its a tuner. Edge is the brand of tuner or programmer. Another good one is the SCT tuners. A tuner changes the shift points and other things to help with economy, towing, and performance. You can also get custom tunes from a tuning company if you have any aftermarket products on your truck and they help get the most out of things like aftermarket intakes.

Anyone interested in getting an Edge Evo CS should check out this thread: https://www.f150forum.com/f2/edge-evolution-133237/. Got mine installed yesterday. Posted some details here (which are mostly important for anyone driving an 09/10). Even if you aren't driving one of those, the site I posted has an awesome deal. Saved around $90 bucks, got free shipping with no tax! Also, I will note, the Edge Evo CS manual states that there is no 'Economy' mode for F150's from 97'-09' and that it can't be added. During my 'activation' it ran an update- lo and behold... Economy mode! Haven't done enough driving yet to see if it will help me, but the tune is there. I don't however see the 'Transmission' tune so it is entirely possible that they just changed the name. If there is a noticable difference I'll post it.
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Old 01-22-2012, 02:40 AM   #18
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After some testing my 4.6 3v with 3:33's and stock tires will get 23.4 on the highway at 70-75 max. Anything less will cause it to drop to 20-21 and anything more will cause it to drop to 18-19.

This is traveling the southern states on pretty flat ground.
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Old 01-22-2012, 11:53 AM   #19
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Here's a thread regarding my EDGE programmer (04-08/5.4);https://www.f150forum.com/f7/install...grammer-93573/. It might have some comments to refer to, but also has a few good install pictures.
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Old 01-22-2012, 12:23 PM   #20
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I just remembered I did some data streaming with my gryphon programmer last summer but its saved as a PDF and it wont let me upload it on here. If anyone can help me convert it to an image or something that i can upload it to here ill be happy to
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