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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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  #61  
Old 05-25-2013, 08:19 PM
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Man, some of you guys' non-turbo IDI's get some crazy mileage, makes me wonder what I'm doing wrong.

My truck gets right about 14 to the gallon, +/- a few decimals. Non-turbo 7.3, E4OD, 4.10 gearing, 4x4, 235/85/16 tires, extended cab long bed. The 45 gallon main tank probably isn't helping me much, or the toolbox, or the lightbar... >.>

It ain't a Prius, but you can fit one in the bed
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  #62  
Old 05-25-2013, 09:06 PM
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It's not the 7.3, but I get 16-18 with my 6.9/ZF5/3.55 combination.

Golden Helmet: To answer your musings; auto, 4x4, and 4.10's


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  #63  
Old 05-26-2013, 12:49 PM
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My '85 E350 cargo van, 6.9L C6 with 4.11's gets 16-18mpg. It does have 414k miles to...


18.2mpg was the highest on a 4 hour round trip all highway doing 55mph. 16 is what I always get otherwise on daily commuting to work and all, so abit of city mixed with mostly highway.



I do have a new IP, injectors, stock tires 235/85R16 and good driving habits.
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1990 Ford F250 4x4, ZF5, L/S 4.10, N/A 7.3L Diesel, 568,808km/377,497 miles, still on the original clutch!
1989 Ford F150 300-6, C6, 2.73, 152,000km/95,000 miles.
1987 Ford E350 26ft. Motorhome, N/A 6.9L Diesel, C6, 3.54, 289,000km/180,000 miles.
1985 Ford E350 Ext Van, 6.9L Diesel, C6, 4.11, 677,000km/425k miles
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  #64  
Old 05-26-2013, 01:17 PM
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Originally Posted by IDIDieselJohn View Post
My '85 E350 cargo van, 6.9L C6 with 4.11's gets 16-18mpg. It does have 414k miles to...


18.2mpg was the highest on a 4 hour round trip all highway doing 55mph. 16 is what I always get otherwise on daily commuting to work and all, so abit of city mixed with mostly highway.



I do have a new IP, injectors, stock tires 235/85R16 and good driving habits.
You automatically have good driving habits in one of those big boxes, since you aren't going anywhere fast . My 86 E350 dropped to about 13.5 consistently after installing ladder racks. Before it was about 15.
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  #65  
Old 05-27-2013, 12:19 AM
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I had a 97 psd 4x4, extra cab, long bed, 4" exhaust. I bought it because I read all the posts on these sites about the great milage. I never got better than 15 mpg and when I sold it this year it was only getting 12. It was very expensive to work on and a real pain to work on too. Check out the posts on changing the fuel pump or the exhaust manifolds. Having said all that, the power was really great. I'm not a huge power nut, but it was nice. I have a 95 f150 5L now and I hate it. Plus, I only get 11 mpg out of it.
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  #66  
Old 05-27-2013, 08:17 PM
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I had a 97 psd 4x4, extra cab, long bed, 4" exhaust. I bought it because I read all the posts on these sites about the great milage. I never got better than 15 mpg and when I sold it this year it was only getting 12.
never go by posts.only use fuel record/reporting such as here;

Ford Truck Enthusiasts Forums - Garage Fuel Economy

1993 ford F250HD DUALLY CONVERSION Gas Mileage (chipper truck) - EcoModder.com

and a real good one:
Fuelly | Share and Compare Your MPG

these give you true averages.not just people guessing and posting their hwy peaks on that trip they had one time driving downhill with a tail wind.
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♠ Chip Truck: '93 F250HD XLT 4x4 1st Gen Navistar 444ci IDI Diesel w/ Intercooled 2nd Gen Banks Sidewinder Turbo, E40D, 3.55, Dually, 9' Dump, & Plow ♠

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  #67  
Old 10-27-2013, 09:59 AM
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1988 IDI with Banks sidewinder 5 speed manual hi way gears 10 lbs boost max fast enough for me empty 17mph trailering 14-15 mph
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  #68  
Old 10-27-2013, 10:29 AM
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i know on 1997-99 your looking at between 15-20 depending on how you drive it
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  #69  
Old 04-26-2014, 09:13 PM
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Wink 1995 F-350 HD 7.3 Turbo 4X4 .355's Crew Cab SRW

I have a 1995 HD F-350 XLT Crew Cab 7.3 Turbo Diesel special ordered in '94 by my Father. He was a truck driver for Roadway 37+ years, to say he knew trucks is like saying Babe Ruth knew baseball. Ford was reluctant, but on this rare 4X4 twin Posi .355 Dana 80 beast; and after many calls from the dealer it was finally shipped with single rear wheels (the lug studs are 2.5" long). Dad said "duallys ride like an Ox Cart". I have known this truck, it's fuel mileage and performance since it was new; and really, with 123,000 miles, the truck is just starting to really run good (it never ran Bad of course). I have owned the truck since Dad passed in 9/99.

As to the fuel mileage: Before our gov't in their infinate wisdom; removed most of the sulfur from the fuel, she would get 17.5-17.9. He always said the mileage was the same; towing a 9600# 26' boat with a 10" camper; or empty. Didn't matter. Now with the new fuel, I've lost 1/2 a MPG. The story is the same. 17-17.5 and I attribute the variation to fuel inconsistencies.

Back in 1977 he had a similarly built F-350 460 Gas V-8 and in trying to get more power (torque) I installed for him a Crane performer towing cam, Hooker Headers, Edelbrock Dual Plenum Performer intake and a real Holley 850 Mechanical Double Pumper. The result was 15% power increase and a 30-35% Fuel Consumption Increase. Mileage went from around 9 to 6.5-7. (that was when any truck 3/4 ton or over didn't require any emissions junk)

He sold the '77 and ordered a new 1986 (if memory serves) 6.9L Int'l Diesel non-turbo truck, same layout, but he still, he wasn't happy with the power. Toying with the idea of 2 aftermarket Banks Turbo's, thats when he opted for the 1995 I own today.

I am a former International employee of 15 years (Maintenance Mgr). The 7.3 or T444E as International sells it, is the most solid performer International ever sold to Ford. Anyone who knows can tell you that. In 1994, the Diesel option cost over $6000 and would only be built with a 5 speed Manual Trans. (at least in the F-350 for sure).

The only real issue we ever really had was constant clutch problems with Ford's Dual Mass Flywheel. Whoever thought that was a "Better Idea" was wrong. I changed the whole assembly to a Centerforce Racing set-up (Flywheel, Clutch, PP, T.O.B.) in '09 and after I changed the slave cylinder to the 7/8" bore, my troubles were over. With the original 1.25" bore slave, all the spot welds broke loose on the pedal bracket, and it actually fell down from under the dash. The clutch with this Centerforce set-up was nearly impossible to depress with the original slave, it did last 6 months before I came up with the fix (call this a destructive test, and the pedal bracket was determined to be the weak link). Been great for the past 3 years. I LOVE my 7.3!!! Happy to try and help anyone who needs it. I still have contacts at the International Plant as well. Regards. I hope all this info helps someone...

Last edited by u00rlt5; 04-27-2014 at 11:37 AM. Reason: typo
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  #70  
Old 04-27-2014, 08:58 AM
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Welcome to the forum u00rlt5

You have some flawed statements.

Your dads truck NEVER came with a dana 90(It was never made )

As for it being a single wheels crew cab 4wd... That was the only was a 4wd crew cab was offered. ONLY cab-n-chassis were available in 4wd duallys from the factory.

Also. in 94 YES the manual trans was the only way to get a power stroke and it was F250/F350 and F-superduty. But it was NOT a 6,000 option. I dod not have the paperwork for my 97 in front of me, but the power stoke IIRC was only a 4,000 in 97

As for your clutch problems, you could of just went with a South bend or Valair clutch and had Zero issues with the pedals to slave cylinder
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  #71  
Old 04-27-2014, 11:35 AM
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Corrections:

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Originally Posted by Diesel_Brad View Post
Welcome to the forum u00rlt5

You have some flawed statements.

Your dads truck NEVER came with a dana 90(It was never made )

As for it being a single wheels crew cab 4wd... That was the only was a 4wd crew cab was offered. ONLY cab-n-chassis were available in 4wd duallys from the factory.

Also. in 94 YES the manual trans was the only way to get a power stroke and it was F250/F350 and F-superduty. But it was NOT a 6,000 option. I dod not have the paperwork for my 97 in front of me, but the power stoke IIRC was only a 4,000 in 97

As for your clutch problems, you could of just went with a South bend or Valair clutch and had Zero issues with the pedals to slave cylinder
Thanks 'Diesel Brad' for clearing this up. Admittedly, I do have issues with memory, and all this was from memory (a mind is a terrible thing to waste on an old guy). The Dana 90 was a typo, should have been 80. The truck was a '95 ordered in '94 and I do remember problems with Ford not wanting to sell SRW? So, I can't explain that and it does have the dual wheel lug studs. That I'm sure of.
This is probably my fault for getting off topic of "fuel Mileage". We were meticulous about keeping track of that. I see others who claim to lose MPG Loaded, but it should be noted that my Father Traveled over the WVA Blue ridge Mountains on his trips. That had effect for sure. In fact it was those mountain passes that caused him to keep going for more power. With the '95 7.3 we could pull most in 3rd and a few needed 2nd for a while, but he was really loaded. This was a dramatic power increase over the 6.9 (even the 460 gas for that matter) and he was finally happy with the set-up. Not sure the year the 7.3 turbo was introduced, but when Dad learned of it's existence, he did order right away. I believe I have the window sticker. Unless he exaggerated, it was $6000 for the 7.3 package, which may have included the trans up-grade & trailer Towing Package? I really don't want to argue any of this. I was just trying to share my experience to hopefully help someone else. Not everyone understands the physics of hydraulics. Like the fact that it even works is simply because the fluid is not compressible, that's why air must be absent, same with brakes. Volumetric expansion of all lines is also a consideration. When I was in my 20's I worked for GM as a destructive test tech. in the Brake hose lab. Even steel lines expand and you lose a little. Engineers try to develop line and hose combos that are as loss-less as possible. Water and air are the worst enemies for hydraulics, and water easily mixes with DOT 3 & 4 which are Glycol and either based. Silicone fluid, DOT5 isn't water soluable; but in general is a sub-standard performer. Not everyone may know that regardless of your set-up; if you switch to the smaller dia. slave, the pedal will be easier to depress. You know: Pie R Squared, to which my Chemist would say "No; pie R round, cake R square". To which I would say "no; my cake R rectangle". Sorry for that, couldn't help it... See how easily I get off track?
I had no intent of posting false info, but that "Dual Mass" flywheel was always a problem. Ford replaced it twice, and when it failed that 3rd time Ford said the part was no longer available. The clutch would have to be closer and closer to the floor to release. I used centerforce because of my success with their products on Mustangs and a Dodge SuperBee. I talked to some guys at the local Truck/Tractor pull and Centerforce was highly recommended. It was necessary to upgrade the hydraulic line to a braided stainless race version too. The factory line was rusting anyway. The Pressure plate springs must have a lot more force, or the clutch problem never would have happened, so I'll stick with what I have, but again, thanks for the info... I will still be happy to try and help anyone who needs it. Thanks!

Last edited by u00rlt5; 04-27-2014 at 09:16 PM. Reason: omission
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  #72  
Old 09-09-2014, 12:09 AM
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poor mileage with my 97 super cab 7.3,auto,410 gears

HELP! I am to the point of selling my truck as it is getting poor mileage. I am a die hard ford fan, but this truck sucks fuel like it's free. Tops on the flat pulling my 38' goose neck with a load of only 2,400lbs I am getting less than 10.What the hell.I have brand new hwy tires running at 80 psi oil is changed every 5,000 fuel filter every other oil change.Please help, I am going to sell it if I can't get better mpg

THANKS
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  #73  
Old 09-09-2014, 05:49 AM
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What were you getting before? a 38' gooseneck is ALOT of weight(about 8k empty) 10 MPG pulling that isn't too bad
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Old 09-09-2014, 05:39 PM
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poor mileage 7.3

Hey Diesel Brad,
I still only get 11 running down the interstate at 68 mph.Feels like there might be a skip, but others that have listened to it say ya it sounds like a diesel.I just don't know
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Old 09-09-2014, 05:53 PM
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Tires aired up?
Alignment?
Fluids full?
What gear ratio?
How fast do you get to 68?
Air filter?
Boost leaks?
Mile on the truck?

MANY things can be wrong here
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Old 09-09-2014, 05:53 PM
 
 
 
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