DAYTONBOY13

I HAVE A 2001 F-150 off road WITH THE 5.4L TRITON V8. the truck has 107,xxx miles and runs really good. i'm getting around 14-16 mpg. this weekend i jsut put in a k&n air filter. and i'm thinking in a few weeks i'm going to put in a new battery, though still not sure what to go with cold cranks? do you guys use the oil reccomended on the oil cap, or do you use something different. i live in south west pa. so it does get cold. i dont really haul anythign but a 4 wheeler in the bed. do alot of hunting so i'm offroad a bit in the fall and i tend gas wells onthe side. i do believe last time i put in 10 w 30 pennzoild syn. blend high milage. with stp oil treatment. but looking at the truck oil cap the other day i'm almost possitive it said 5w30. i used the 10w 30 cause my bro in law uses it in his 03' f-250 5.4l. now i dont know what to do. but withthe engine getting up there i want to do whatever i can for it, to make it last and to get the most out of it.

Moose08

I have a 1997 f150 ext cab 4x4 with a 5.4 with about 125,000 miles most of those are hard miles in the 80mph+ fast take offs so n so. Yes the cap will say 5w-30 and I run gtx high milage with lucas heavy duty oil stabilazier also run lucas fuel system adds every oil change as well I highly recomend Lucas oil adds. I have friends that have high milage trucks and they run cheap 10w-30 even 10w-40 in them because its cheaper then syn high milage oil. You being in colder weather i would stick to the 5w-30 for sure its never giving me any problems. Also the K&N gold oil fiter isnt to bad to pay the extra money for when i switched from a mobil1 to the K&N the oil stayed more rich i noticed when i was changeing the oil. Also i belive one of the major things to keep an engine running log always change the oil every 3,000 or 3 months for me i never hit the 3months.

LIT3MUPHINES

if youd like to see 20mpg, and still be able to roast the tires, get the edge evolution programmer, a cat back dual exhaust, and a good intake setup. i have all 3, and a few other mods, and man does my truck get up and go!

aspenF150

Best advice I can give you is if you want the best out of your truck, you gotta give it the best. Maticulous maintence, right parts, fluids and mods. As far as oil goes, I swear by Amsoil. I usually go 12K or once a year whichever comes first. I'm no dealer just a believer in the good stuff.

I'm with LIT3 - Tuner, exhaust and intake will help wake up that 5.4!

Lariatorgco

Ok, this sounds good, what is your intake setup and other mods? I hav got the cat back, K&N intake and the superchips but not seeing 20 mpg. I have a new post listed for a new intake manifold - any mods there?

torkum

The only way you might even come close to 20mpg in a 5.4 is to get a custom tune written for you truck based on fuel milage only and adjusting you driving habits too. I get 16mpg on my rig after installing a canned Superchips programmer running premium fuel.

Lariatorgco

Hey Torkum, I see you upgraded your injectors, did that really help?

Moose08

20 mpg i get like 15 max on the highway and like 12 intown lol

torkum

The place I notice them the most is at idle, no feeling in the steering wheel when the motor is running. Under the hood I don't hear them chattering like the old ones.

Lariatorgco

What type of injectors did you go with or would you recommend?