I have a 97 F-150 that is in excellent condition, and I heard that the 5.4 liter tritan gets better gas milage than the 4.6 liter. Can anyone verify this? I heard that it was because it is easier for the bigger motor to pull the truck. I would like to hear anyone's input on gas milage and what they have heard.

 

One word the gas mileage SUCKS!!

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99 F150 SC,5.4L,4x4 ORP,TTP,Gibson Single Side Cat-Back Exhaust System,Airaid,Duraliner Bedliner,Lund Bug Deflector Shield,SmittyBilt Outland Sport Bumper Guard in SS,Two KC DayLighters Off Road Lights,Two Eagle Eye Off Road Lights,A.R.E. Cab High Bed Cap,Valentine Radar Detector,ICOM 2M/70CM Ham Radio,R.F.Concepts Linear Amplifier,2watts in,170 watts out,Diamond SG Series Dual Band Antenna.

 

Get 370 miles on 20-23 gals. 5.4 V8, sometime worst sometime better.

 

This last tank filled up got 13.4 mpgs all city. I have 1600 miles now and mileage going up very slowly. Started like 12.5 and now Im up to 13.4. So I am getting what they say for city 14mpgs. This is the best truck I have ever driven and is worth the $15 more a week than it used to be with car.

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2001 F-150 5.4L trition,
Regular cab with 8' bed
XLT with Black Clearcoat
4x4 3.55 limited slip
factory cab steps
class III tow package
Factory ordered: 12/5
recieved: 2/22

Current Mods: Ford Plastic bedliner, Bug Deflector II

 

JLetson2001,

The 5.4L definitely does NOT get better mileage than the 4.6 (unless my grandmother was driving the 5.4 and one of our members was driving the 4.6 ).

I have the 5.4 and currently average 13.6 miles/gallon (vs. 12.4 when I first got it). I don't know if the increase is due to normal break-in or the mods but the recent average is pretty consistent (considering my driving habits get worse with each mod, this improvment is actually larger than it seems ).

Regards

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2000 F-150 XLT Supercab, 5.4L, 4x4, 3.55 gears

• Premium AM/FM Radio with CD
• Smittybuilt sure step bars
• Ford (Duraliner) Bedliner
• Class III Tow Package
• Superchip
• Ravin Z-55 SI/SO Exhaust
• K&N Gen II FIPK

 

I just got my 2001 SuperCrew 5.4 2/22/01. Mileage started out rough, about 12-13. With almost 4000 miles on the clock now, I managed 18 on a 100% highway trip, going 65 the whole way. On the way back I pumped it up to 70-75 and mileage went down to about 14-15. The only difference I can think of (other than cruising rpms) is that on the way up to NC, I had a small load of boxes that came up to the top of the bed rails. I put a tarp over the boxes and strapped it down really tight. On the way back, without a tarp over the bed, the mileage was WAY worse. Ofcourse, I did go a bit faster too. I need to get a tonneau and try to figure out where the big difference is comming from. Anyone else have any thoughts on this?

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2001 XLT Supercrew, 4x2, White, Tan interior, Class III Towing, Sliding rear window, Power Seat, Auto-Lights, 5.4, Auto trans, Ford bedliner
Future mods: Vent shades, front tint, snug top or tonneau, nice boat to pull (got the ride to pull one now!!!)

 

i get 17 to 18.5 mpg on my 97 4.6 4x2 ext. cab. it has 116,000 miles on it. btw, mpg went up after installing the superchip. added airforce one and bbk 75mm throttle body after chip and mpg still 17-18.5. travel 75-80 miles to and from work on i-75 with some town driving. almost forgot; have f/m delta 50 muffler.

 

Brand new mine got 10mpg. Now consistent with 14 city/17 hwy.

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2000 F-150 XL, RC, LB, 5.4L, 4R70W, 3.55LS,
Class III tow, Payload #3, & Convenience pkgs.,
4-wheel disc/ABS, Chestnut/Parchment 40/60,
Ford bedliner w/Paintsaver & gas/wheel/spare locks,
K&N F.I.P.K. w/Outwears pre-filter, Superchip,
Dynomax ultra-flow welded 3" cat-back w/ 3" Y-pipe,
Hellwig front & rear anti-sway bars, Rancho RS 9000s,
Mobil 1, K&N oil filter.

 

I get 22 on the hwy, and about 17 in the city - but it's a 5sp, 4.6 and a short box reg cab. Much lighter than the supercabs. And, i am pretty good and not getting up off the line too quickly, which i think makes the biggest difference of all.



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Bambino Online
Owners Gallery Truck #179
1999 reg cab/short box/ORP - 3.55; 4.6l 5sp; factory snapless tonneau; twin 6" kicker sub tubes; Custom Exhaust; Mobil 1 5w30/Motorcraft FL820-S

 

My 4.6 5-speed gets 16-17 mpg and I beat the snot out of it. I'm at WOT over 4,000 rpm at least 15 times a day.

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2000 XL 4.6 5spd 2WD reg-cab long-box 3.55 LS 235/70/16 Chestnut (not 2-tone) Raven-Cap (and a '66 GTO with a '73 455, both combined cost less than a Lightning )

 

Around 15 mpg 60 miles round trip everyday (50% country/50% highway). I've found that I can maintain this up to 69 mph, after that it goes downhill. Just my $.02.

 

Last fill I went 405km or 253miles on 77L or 20.34Gal, all city driving in the winter, which averages out to 12.44mpg. Man that sucks!! On nice days I can stretch it out to maybe 435-440km on 80L, which is about 13mpg. God that still sucks!! I thought it was a little better then that! Time for the performance exhaust system.

~'98 F-150 XLT Reg. Cab Flareside 4x4, Black, 5.4L, 3.55LS, tow package, 285/75/r16 Mud Terrain BFG's,K&N,WMS Velocity Tube, GTS headlight covers, Alpine changer w/FM mod, Clifford alarm system w/keyless entry & starter disable // Future considerations: Bed mat, tonneau cover, 4" suspension lift or 3" body lift.

~'71 F-100 Sport Custom Reg.Cab
-390FE w/Edelbrock Performer RPM intake, 780cfm Holley, ported & polished cylinder heads,
Hydraulic Crane Cam, 10.5:1 CR, Black Jack headers, true double roller timing chain, and high volume oil pump
-C6 transmision w/B&M 2600rpm stall
-9" Ford Rearend w/4.10 Richmond Gears & 31 spline axles
-215/65/r15 Yokohama's for the front & 28"x13.5"x15" Mickey Thompson ET Street slicks for the back
Best 1/4 mile time @ 3500ft altitude 14.69secs @ 92mph

~2000 Suzuki RM125 Dirt Bike
-no need for any modifications! (yet)

~2001 Traxxas T-Maxx Nitro Monster Truck
Modifications: -180degree carb flip w/return spring installed


[This message has been edited by fordification (edited 04-04-2001).]

 

About 12 in the winter
and 14 in the summer


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99 XLT SC 4x4 STYLESIDE ORP 5.4,AUTO & 3.73 POSI
MED. TOREADOR RED
EXTANG TONEAU,BED MAT,
K&N FILTER & WOOD DASH KIT

 

I've filled up 31 times now since I got my truck on 04/24/00. My running average is 13.02mpg and it's been improving over the months. My last tank was 13.80mpg after using BG44K. I use the a/c a lot, get stuck in traffic both to and from work, and often do 75mph when the road is clear. Not bad considering mine's a 4x4 with an automatic.

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'00 5.4L AUTO 4X4 Lariat (Black/Silver)
'02 F-350 PSD CC DRW 6SPD 4X4 Lariat (order this year)
www.hawthorn-engineering.com

 

My mileage stayed about the same since new (13K now with Mobil 1) I get, in Massachusetts, the following:
* ~12-14 all city (summer)
* ~9-11 all city (winter)
* ~2 mpg or so higher summer and winter for mixed highway/city.
* ~17.8 total highway trip, round trip=840 miles(spring, 50-60 degrees or so)

I have kept records since new, but haven't stopped to figure out any long-term averages. The mileage is bad enough that I guess I lost interest and just make sure I've gone to the bank before filling up!
I do let the truck warm up several minutes or more on remote start in winter which kills mileage and never have taken a long total highway trip in the winter. Also I have autolamp and I've blocked the sensor so the lights are always on for safety (Eastern Mass has some of the WORST drivers!)