I have a 1997 F-150 Reg. Cab 2WD, 4.6 auto, before any mods i was getting about 13-14 mpg. After getting Flowmaster 40 series DeltaFlow, installing a Superchip, and K&N, now i can get about 18 mpg. If i wasnt so lead footed i might get better, but i like to floor it alot with that superchip. guess it all depends on how much you like to torque as to what your gas mileage will be.

 

I have a 98' F150 STX, 4.6L reg. Cab that has been getting from 17-18 Mpg. I drive city and hwy. 50 miles one way everyday.

 

97F150SC5.4ORP you only have 15,000 miles on your truck and its a 97. So that means you only drive the truck a little less than 4,000 miles a year. Are you sure thats right? maybe you meant 150,000 miles? I wish I could keep mileage low like that


------------------
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

 

I am only on my 3rd tank. 2nd one on me. Dealer filled it once. Anyway I am very happy with the 16 mpg (328 miles on 20.489) I measured on the last fill up. Hope it improves with age and mods. I will probably get a soft tonneau as well as mods listed in sig.

 

JL

I'm getting between 12.5 and 13.5 per gal.
This is with a 7 mile drive, on back roads, to work. My driving style is a mixed bag of racer-X and granny-style.

RB50

------------------
1998 F-150 XLT 4X4 Supercab Flareside
Bright Red, Med Graphite 60/40 Int
4.6L V8, Auto, 3.55 gears, HD/Tow Pkg, ORP
Slider, Keyless Entry/Alarm, Pwr/W/L/M/S

ADDED

Uniden PRO520XL/Wilson 1000 CB
Alpine CHM-S655RF 6 CD Changer
Ventshade Stepshields in grey color
Stillen bumper cover
Bladerunner grill insert

 

With 3000 miles on mine, I'm getting 13.6 mpg rural city driving. I did a highway trip of 220 miles last week and the gage was still reading over half full!

------------------
Badd Andy

2001 Toreador
F-150 Supercab XLT
7700lb, 5.4L, 4R100
Tow Packg, 3.73
DRL Foglite mod
Headlites Relayed
A/C cutout switch
RS 9000's all around
Bug & Wind deflectors
Dupli-color bed
Lund Premier Tonneau
Short rubber antena
98 ANGLER 8.6 Camper
95 Windstar w/replaced head gasket
97 Susuki Bandit 1200
87 Yamaha XT-350

 

Badd Andy:

One thing you will find out, that after the half-way mark on your gage, it drops like a rock! I get 100+ on the first 1/4 tank, up to 175-200 at the half-way mark, 250+ at the 1/4 mark and lucky to see 325 when the low fuel light comes on!!!


------------------
2000 Flareside SCab 4x4, 5.4 w/3:55, Oxford w/gray leather captain's, upgraded Lariat pkg, Class III towing pkg, all power, 60watt fogs+hi beams, billet third brake light cover, monogramed dash cover, expy console, K&N, custom exhaust (single in-dual out) with Flowmaster 40, Superchipped, 5.4L badges. Waiting to be installed: Hellwig anti-sway bar, Trenz billet grill and OE bladerunner.

 

How large is the '98 F150 gas tank?

theone

 

Casper II, I put another 105 miles on it with city driving and still had over 5 gallons left in the tank. Total average 16.75 mpg.

I too "usually" see the low fuel light on around 325.

[This message has been edited by Badd Andy (edited 04-06-2001).]

[This message has been edited by Badd Andy (edited 04-06-2001).]

 

theone,
A 98 short bed has a 25 gal capacity and the long bed has a 30 gal capacity. I am of the latter. A nightmare every week when I go to fill up. My it costs more to feed my truck than it costs to feed me!!

------------------
98 Reg cab XLT 4X2 LB
4.2 V6 mnl
SnugTop Xtra-Vision camper shell, Drawtite class III, GTS Headlight covers,
Wilderness AT P255/70R16

Very near future:
Bosch plugs & wires, Herculiner bedliner, Window Tint.

Further down the road:
FIPK, Gibson Dual Sport Truck exhaust, Billet Grille, custom alloy wheels, painted taillight covers, nerf bars, headers, suspension lift.

Dreamin about:
Supercharger!!!!!!

 

I have a 2001 long bed and it has a 25gallon tank. Did the pre 2001 have 30? I always thought were 25. I know mine is 25

------------------
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

 

DaveH Ford has always been 30 for the long bed and 25 for the short(24.5 for 4x4) I'd check again.

 

Its 25 I am positive 100%. I think I know when I am near empty and it takes 24.5 gallons to fill it. It also says in my manual. Mine is 4x4 with 8foot bed.

------------------
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

 

I have a totally stock 1997 F-150 XLT SC 5.4L 3.55LS 4X4 ORP with around 15000 miles on it. I get 13-14 MPG city driving and 18-20 MPG on the highway. Highway driving I will see 20 MPG running 60-65 MPH. 70-75 MPH will net me around 18 MPG. I seriously doubt that the 5.4L gets better mileage than the 4.6L but love that extra HP & Torque!

------------------
1997 F-150 XLT SC 5.4L 3.55LS 4X4 ORP

 

Nope, just 15,000 (14,??? Actual). I'm second owner. Truck had 12,414 on it when I bought it a month ago. First owner only home 1 month a year. So it was only driven 1 month out of the year.