Fuel milage

[hugeredford]

I have a 95 f350 crewcab w idi + ats non wastegate turbo 5sp 4.10 gears 35 12.5 16 in. swp truxus sts's 8in lift. I can only get 12mpg low too 14 tops.I was thinking it should get more like 16+ or am I expecting too much for this big of a truck. only weighs 6800 lbs my dads 16000 pound freightliner w a 365 cat gets 12 mpg bobtail. Why can't pickup truck manufacturers make their trucks get better milage. Also I was wondering what kind of mpg your idi's were getting.

 

[seanpistol]

i set my all time record today.

230 miles on 10.3 gallons of fuel. 22.3 MPG.

 

[EvergreenRanch]

so which mountain were you coasting down? lol

 

[hugeredford]

do you think if I lift the back of my truck up more i will get better milage . I'll be going down hill

 

[towcat]

my '92 f350 gets the same mileage as you do. 12-14. my biggest problem is the severe inability to keep my foot out of the throttle. I am frequently bouncing off the governor in 5th gear. So....for a CC dually to get that kind of mileage tipping the scales at 8k, I am just plain tickled happy.

 

[broncobilly_69]

last time I checked it I got about 15 empty on the open highway.

 

[tonkadoctor]

35 12.5 16 in. swp truxus sts's

That's a big part of your fuel milage woes right there. My 82 F150 would get 20 with the stock skinnies and would drop to 15 with 32 x 11.50-15 all terrains

I was getting about 15 - 16 when I had 4.10 gears
Now getting 18 around town, 20 - 22 on the highway and 15- 16 pulling my trailer. All flat land out here.

driving style has a big effect on fuel milage, I ease into the throttle like grandma and am rarely over 1500 rpms in 1st through 4th. Bear in mind that 99% of my driving is hauling nothing but my 200 lbs around and on the highway the cruise is set at 63

On the scale my regular cab hit 6100 lbs with me sitting in it.

 

[82fordtruck]

That's a big part of your fuel milage woes right there. My 82 F150 would get 20 with the stock skinnies and would drop to 15 with 32 x 11.50-15 all terrains

I was getting about 15 - 16 when I had 4.10 gears
Now getting 18 around town, 20 - 22 on the highway and 15- 16 pulling my trailer. All flat land out here.

driving style has a big effect on fuel milage, I ease into the throttle like grandma and am rarely over 1500 rpms in 1st through 4th. Bear in mind that 99% of my driving is hauling nothing but my 200 lbs around and on the highway the cruise is set at 63

On the scale my regular cab hit 6100 lbs with me sitting in it.

I agree completely.

If you want better mileage, go back to stock. You catch a lot of wind and have a lot of rolling resistance.

Your dad's truck is better set up for what it does, with good gearing, and a fuel efficient engine. But, it's only good for that purpose, pulling a trailer. Yours is supposed to drive empty, race, pull a trailer, and go off roading.

Tonka here did the same think I am talking about. He only loads mowers in the back of his truck, no real trailers. He also doesn't off road or race, so he put a 3.08 rear end in, and is getting great mileage.

 

[Black dawg]

is your speedo/odo calibrated right for those tires? if not, there is 10-12% that your not adding up. and yes swampers dont help either. how much air are you running in them?

 

[hugeredford]

I do recalculate for tires they are about 14% bigger than a stock tire I run 65 psi in the tires. Do you think an open element air filter will help at all. I have 3 inch exhaust to the bed and two 5in stacks no muf no cat have plenty of exhaust flow. Truxus sts's are not very aggresive like a bogger they're almost like a street tire with a cool tread pattern.

 

[seanpistol]

driving style has a big effect on fuel milage, I ease into the throttle like grandma and am rarely over 1500 rpms in 1st through 4th. Bear in mind that 99% of my driving is hauling nothing but my 200 lbs around and on the highway the cruise is set at 63

exactly. if i've got my foot in it constantly i have seen as low as 13 mpg, but when i drive it just like you described, i've seen 22.3 mpg.

 

[Huntersbo]

That is just spectacular! I get 6 in my 1982 F-150 with a 351 W 2 barrel, short duration valve timeing, restricted breathing and 2.25" singel exaust. It has 4.11 gears with a stock c6. I have seen as high as 15 keeping my rpms below 2500 rpm and peak torque feals to be 2200-2300 rpm.

I would say 6-15 mpgs in a light gas 4x2 pickup and 5-13 in a 4x4 light gasser pickup. I would think 4-13 in a full size 4x2 gasser and 3-11 in a full size 4x4 gasser.

I would go so far to say that 9-17 in a full size diesel 4x4 is good, 11-19 if it is 4x2. You guys are getting better, wow!

I would like to see 12-17 my self!

 

[Huntersbo]

Yesterday, 08:30 PM #1
hugeredford
Registered User


hugeredford you said:

my dads 16000 pound freightliner w a 365 cat gets 12 mpg bobtail. Why can't pickup truck manufacturers make their trucks get better milage. Also I was wondering what kind of mpg your idi's were getting


I do not know my self but I think that industrial engines turn lower rpms. What rpms does your father's freightliner turn? I have found an improvement for lower rpms. I have found a 3 mpg improvement for running 3000 rpm and lower instead of 4000 and 5000 rpm range! Unless your engine is well balanced for that rpm (big $$$ or big skill) you are loosing lots of power/torqe to friction. 13 I think at 2000 rpm, 21 at 3000 rpm,31 at 4000 rpm I think. 44 at 5000 rpm, 58 at 6000, 77 at 7000, and 99 at 8000 rpms. Wow, even thoughit cost less to run a gas motor it still cost alot to turn gas motor rpms efficintly! You need a forged crank to hold up if you hang around 4500 + and $$ for balance. Diesels cost more becasue they have heavy forged rotating mass that you need anyway in a gasser if you get and real torque.

So is truck a gets 2 mpg and turns 5000 rpms and truck a gets 10 mpg mabe it turns 2800 rpm max!

I think it cost less to turn 1000-3000 rpm then 2000-4000 rpms!

 

[hugeredford]

does anyone know if K+n makes an open element filter for the ats turbo, the stock filter is rectangular about 6"x14"x1 1/2"

 

[towcat]

does anyone know if K+n makes an open element filter for the ats turbo, the stock filter is rectangular about 6"x14"x1 1/2"

as per ATS's PDF file...K&N 32-2088