SoCal ------ get an oil burner!!!!!!!!

 

Actually,I have a '99 PSD 4x4 w/ 35": tires. I spent the last weekend in the mountains snowboarding. I drove 77-80 mph on the freeways then took it out of overdrive for 2 days of mountain driving. Played in the snow and got a little stuck (3x); and still averaged 15.8 mpg (manuel calculation) on that tank of diesel! Not to shabby! I must admit though, before the chip (Delta Diablo), airbox (Volante), and turbo back exhaust system (Jardine)I was lucky if I could get 14 mpg on the highway.

 

Ok I have a 99 F250 PSD and I am getting 14.5 to 15 no load, with a load a little less. I am trying to find out if this is usual or not? what are you getting? and I am un modified, so if you are please note it, thanks!

Jt

 

Purchased a Superchips MicroTuner for my truck and programmed it right before heading out of town...got 60hp more...and increased mpg from 13.6 to 15.4. It's a step in the right direction.

 

While everyone's whipping it out and comparing...mileage...try to mention what your axle ratios are, cab size and auto or manual trannys.
A crew cab long bed is going to weigh a half-ton more than some others and suffer in city driving, a 4x4 gets worse mileage than a 4x2, 4.10 axles are going to get way worse mileage than the 3.73s at highway speeds, and lifted trucks are going to lower mileage because of more wind resistance on the highway.

I'm driving an '02 S/cab, short bed, 3.73 4x4, SRW, auto, SCMT, AFE Magnum intake, stock tire size and no lift. Not towing, carrying about 300 lbs of tools in a box all the time, I get 15.1 worst-case mostly suburban, stop-and-go driving to 19 best MPG- and that's at about 65 MPH, on a straight, level highway with the cruise locked on, keeping it below 2,000 RPM. If I speed up to 75-80, I seem to lose almost 2 MPG. This is all figuring the old fashioned way, pencil and paper, filling up the same way each time. And that's on the winter fuel I buy right now in northern Colorado and Wyoming. I lost about 1 to 1.5 MPG on the winter blend over straight #2.

The SCMT made NO measureable difference in mileage, but is sure made the truck perk up when I need to pass on a two-lane or merge.

Cold starts every morning below 25 degrees outside hurts overall mileage- that smoke is wasted fuel, and letting it idle a lot to warm up really puts a hurt on mileage, too.

So that's my not-towing mileage on an '02, 15.1 to 19, under the best of conditions on winter blend fuel.

 

ok, mabey I have a problem, I get 15mpg, on a 99 250 Shortbed, on mixxed hwy/city driving, with a 3.73 L1 axle, stock sized tires, no lift, auto tranny, and I try to use cruse on hwy all the time, and I am really good at keeping her below 2,000rpm.

Also if this helps, when I start her up, and avg here now is 36-42f degreese in the morning, I let it warm for about five mins, and from what level the fuel gague said last night to after I start it up, and let it warm it goes down 1/10.

Any Ideas, I have just replaced the air filter, and I am considering the fuel filter, although it was said that I dont need it yet, according to miles.

BTW: I recently purchased this truck, so I really dont know the history!

Thanks

 

The proven old method of filling up and recording your gallons, punch the trip meter each time and record, do this several times, then add the total gallons and divide it into the total miles driven. This will give you the most accurate mpg. But remember your driving habits must remain the same each time and it will be considerably different if you tow, drive around town, or run the interstate. Rickey

 

 

My 03 has about 6000 miles. It gets about 21-22 mpg at 60 mph (19 mpg @ 75-80 mph)on the highway and 11-13 in town. I drive it like it somebody elses though. My wife gets better mileage though. My 99 F150 only got 17 mpg so can't you complain about that. Heck, I wish I was getting 28 like them doodges and shevs.

 

I seem to be doing pretty well in comparison, especially considering that my truck has some handicaps like an extended cab, 4x4, and 4.10 gears, and 163 thousand on the clock. It does have a manual 5 speed w/overdrive. I keep track of miles and fuel the old way, pencil and paper. I just filled up today, after driving 533.1 miles on 26.6 gallons of fuel=20 mpg. I get pretty consistently 20 mpg; thats combined freeway (about 70mph), stop and go, whatever. If I throw on the 27 foot travel trailer, it drops to 12-14. I once got under ten, up over the continental divide coming into Silver City, NM, and trying to go too fast. But since I've owned the truck, I've averaged 17.2 mpg total...towing, not towing, city, freeway, whatever. Its a '96 F-250 HD...are they much lighter than the SuperDuties?

 

Just over 14 on the road. I usually keep it about 75 MPH. 1999 F250 supercab shortbed with 100,000 miles.

Brian

 

All before installing Superchip Microtuner (just installed it yesterday, so I have no data):

55 mph unloaded: 17 mpg
70 mph unloaded: 13.5 mpg
City/freeway combo driving: 15 mpg
Hauling 10,000 pound fifth wheel (our home): 8-10 mpg

YMMV

 

I don't know what to think of what every one is saying. I tow a 8,500lbs trailer. I get 14-15 mpg no matter what I do. This can be city, highway, towing, or not towing. I have just purchased a microtuner. I hope this improves my milage?

 

14-15 mpg towing an 8500 lb trailer sounds pretty good to me! I don't think you can find anything that will do better than that, towing.

I notice a real difference in mileage with the speed I drive on the freeway. If I go over about 2500 rpm (about 70mph), the mileage suffers. And when towing, I don't go over 65, same reason. In fact, at 60, the mileage gets better still, but thats getting a bit too slow for freeways around here.

Btw, filled up yesterday, 494 miles on 23.7 gallons, 20.8 mpg

 

I just bought a 1996 F250 Crewcab, shortbox, 3.55 gears, Lt235 tires and automatic transmission. The previous owner mainly used it on the highway and said he got 18 mpg, has 161K on it.

Filled the truck Monday and put on 150 city miles with the OD locked out and 350 highway miles 60-75 mph. Some of the city miles were in 4WD due to snow. Temperatures have been -6 to 32 degrees. Did a total of 502 miles and put in 28.76 gallons for 17.5 mpg.

The truck is totally stock right down to the never replaced exhaust. I'm planning to try the Hypertec processor and maybe a 4" pipe in the future.

With the 3.55 gears the engine is only turning 1950 rpm at 70....this thing may outlast me....Bob