Same here....my father in law has a 5.9 liter gasser v8 dodge, he drives it mostly highway to work and back, and only gets around TEN to 12 mpg. I drive almost 3x as far as him every week in my commute in my SD, and I spend about $20 LESS in fuel.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I suppose it could in theory if driven at 55mph and had the suspension lowered to the ground with a tonneau cover on the bed in SWB form....

__________________
1974 240D 3.0L 4(M) - 250K -OM617.910 + 300D FW + Rajay turbo power!
1977 6.9 3(A) - 84k

My 91' F700 gets between 11-12.5mpg with a 93' 12 valve cummins in it , 5spd Eaton transmission and 2spd rear axle. Weighs in at 19,500 lbs empty.

My friend just got a new duramax with all the emissions crap on it and averages 22mpg.

On the gas Chevy maybe a 4.8 but the 5.3 and 6 liter are thirsty engines. The older 350's where even worse. My TBI motor gets 12 when empty and about 6 when pulling something. Reliable as hell but really thirsty.

__________________


Experience : what you receive 3 seconds after you really needed it !!



86 300SDL 387,000? Motor committed suicide
81 300SD 214,000 "new" 132,000 motor
83 300SD 212,000 parts car
83 300SD 147,000

91 F700 5.9 cummins 5spd eaton 298,000
66 AMC rambler American 2dr auto 108,000
95 Chevy 3/4 ton auto 160,000
03 Toyota 4runner 180,000 wifes

Removing emissions equipment form a modern truck diesel results in HUGE power increases and moderate economy increases. It takes a lot of energy to be "green"

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I may be mistaken but in theory that's no different than just limiting how much fuel your giving your engine with your right foot. What happens when you need that power and cant access it?

__________________
1981 300SD 512k OM603

Or you could take all the crap off and then run bio and you have the best of both worlds... I know from experience

I've done 26mpg highway when I had 17's on my truck... I'm down to about 20-21 highway now since I put the 20's and big mud tires on it... 2007.5 Chevy Duramax with custom tuning by me

A lot faster than my w123 but I enjoy driving both

The chip on my truck is good for 40HP (tow safe) 80HP (economy) and 120HP (power). It seems to add some extra timing advance in the 80HP mode because I can hear the engine get noisier when I switch to it.

Best I've gotten was 18MPG with an average of 16 and 11 when towing another vehicle.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

My 89 Cummins (std cab, 4WD, 5 speed Getrag) will consistently get the following:

Highway, unloaded: 21-23mpg.

Towing a car trailer with car: 17-18MPG.

Towing a 27' Airstream: 14-15MPG

Commuting: 20-21MPG

Numbers have stayed consistent over the last 13 years.
Fuel pressure has been cranked a bit, but truck is basically stock and doesn't smoke at all. I also tend to drive for mileage, not for speed, that's what the 560SEL is for....

Jim

__________________
14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles

Ok don't believe me. Ill try to take a pic after he drives a bit and has his trip miles up on the same tank of gas. There is no point in lying on a MB forum

I will agree with him on the 24 based on a couple of things.
I had one and if the following was followed 24 was acheiveable.
65 mph.
Flat ground(IN,IL,OH type of flat)
All highway.
We took ours from nw pa to Watertown SD(1200 miles) running across the flat ground we got 22 at 72 mph. But if it was the 4x4 i would have to say no way. Dont forget that the gm trucks shut off 4 cyl when not needed.

__________________
86 300SDL. 250,xxx on #14 Head. One eye always on temp gauge.. Cruising towards 300K

I think the second poster in the thread has the correct question. I've heard it said that the most common lies told are regarding fuel mileage and IRS forms.

I've owned two Powerstrokes in the past that were chipped - a 2002 7.3 and a 2004 6.0. With the chip in, the MPG gauge would read high and that happened on everyone's Ford who chipped it. So a guy who didn't know what he was doing, would look at the MPG gauge and say "Holy Crap! I'm getting 24 mpg!" but he never did the math by hand. Since then, I don't believe these chipped trucks claims unless they calculated it by hand. Can a Duramax get 24 highway? Sure, if it's setup right (2wd), accelerated easily, chipped, and goes no faster than 65 on the highway.

__________________
- Brian


1989 500SEL Euro
1966 250SE Cabriolet
1958 BMW Isetta 600

There are no odometer problems with his truck. And his truck definitely has power when you need it.

nobody said anything about odometer problems, it's just that if you are using the onboard MPG readout, it's erroneous. to figure mpg's accurately, you need a full tank of fuel, and a odometer and a calculator (or someone else's brain...) and actually, you need more than one tank, and have to average the miles over the tanks.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

I had a client with a dodge diesel that stated that he could get 24mpg with his banks set up. Do understand that cost of the banks systems means that your really not going to safe any money on diesel, unless the price of diesel is $7.00 a gallon. LOL But it was nice to drive his truck around, because that truck had some major power.

http://bankspower.com/app/index/2

I hear you get the most out of the system if you get the package deal. Tuning, exhaust/intake and ram intake system.

I need to get off this website, I'm feeling I need to purchase a truck. MOST LOG OFF. MOST LOG OFF.

__________________
Professional greasecar installer
Austin TX


98 Jetta TDI with grease car kit + veg-therm (totaled)
87 MB 300SDL running on B99 / greasecar kit + 30 fphe
www.austingreaseguys.com