ymeski56

Don't be hate'in! 22+ @65mph. 18+ @ 80mph./// 87' 302 w/ 83K./ 87 octane.

I don't keep track of city driving mpg. Although I reset my odometer last refill, I'll post it in a couple day's if this thread's still kickin.

carrieon

95 302 auto flare side 195000 mi. 20 mpg @ 60 mph.

94Bronc

94 bronco, 14 city, i've gotten between 18-24 highway

dr_bowtie

95 300-6
list of mods...

160 degree T-stat
E-fans on rad (throw that clutch fan away )
MSD 6A box and Street Fighter coil (45,000volts)
Brass Cap and rotor
Walker Turbo Muffler and tail pipe at 2.25in
Timing bump to 16 degrees base
Autolite Double Platinum plugs...


I get 17-19mpg city driving and 22-24 highway at 65/75mph....

suck it up....lol

62champ

4.9 L6/3.55/M5R2 I bought back in January (nothing like a two hour drive in a used vehicle with four questionable tires/unknown maintenance/etc.. in 10 degree weather...) and have run four tanks through it. Averaged about 13.5 for the four.

Just got done with timing advance (16)/new plugs (motorcraft CC)/new plug wires (Taylor street thunder /new cap (taylor high per.)/new rotor (taylor high per.) and new MSD 48K coil.

Am making an eight hour round trip to New York's Mohawk valley on Monday - we will see if there is any difference. On the return trip I am pulling back a trailer load of wave runners - so we will see if it still goes up.

phillie

My co worker has a 95 F 150, original owner with 200k miles. He has the 6 cylinder and gets 19 mpg on the highway and 16 city. Get this, he still had his original brakes! He's an older gentleman as you can see.

ymeski56

That's very .........."brave" of you! Do yourself a favor, & take a timing light & whatever tools you need to retard a degree or two if needed. 16 BTDC is still uncharted waters for your engine. The first time you pull a grade w/ a load, at closer to normal ambient temperatures, may catch you w/ your pants down.

I advocate 16 BTDC for healthy, well maintained engines, but I always stress "safety first"! I would also recommend (you won't see this very often) running 89 octane on the pulling leg of your journey! (may not be necessary, just good insurance)

Motorctaft C/C's are actually engineered to fail before piston damage occurs, But I wouldn't trust all my pistons to that statement. They're supposed to, that doesn't mean they will!

You'll notice your new base time will tend to dramatically improve it's ability to climb a grade more effortlessly, but watch for ping as you reach the crest of a grade & start to take your foot out of it.

Right about there, you may enter "Ping" city limits! It's a lot easier not reach ping threshold, than to drop back below it, once it has been crossed! A bottle of "Water Wetter" in your coolant system would be a VERY SMART idea, & I HIGHLY RECOMMEND it! It will make your coolent system much more effective at keeping you below "Ping" threshold!

$8. Your engine is worth it!

I've never had anybody come back & say they pooched their engine after the Ignition System/ timing bump. You don't want to be the ground breaker for that. The fact that it's tolerating 16 BTDC implies your engine's in good shape. Let's keep it that way!

DrivePower05

i have got a 2005 fx4 flareside , 5.4,and ifeel i get awful gas mileage. i believe i am getting about 9mpg do ya'll think the fuel filter is about time to b changed.. when i bought it i could tell they had been off road with it. even with 33s i feel it should be a little faster and a little better gas.. am i wrong?

ymeski56

When was the last time you did "what" to it? Sounds like it's been driven a long time w/ nothing done but refilling the gas tank!

62champ

Thanks for the advice - have the timing light and distributor wrench behind the seat. I already Seafoamed before the timing advance - as you always recommend - and by the looks of the plugs it was burning everything pretty good - engine only has 95K on it which is just getting broken in for the 4.9.

I will probably throw in some water wetter (Redline?) before my trip to Texas in August - pulling back an 18' trailer with a 1953 Farmall SuperC on it...glad the truck does not have AC - I would be too tempted to use it...

Thanks again.