What, a gas or a psd?

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My V-10 EX goes 350 miles on a tank while towing our 11K TT, of course the EX does have the 44 Gallon tank, at our typical 9MPG that leaves over 5 gallons in the tank at refills. The 6.8 is best summed up as affordable, capable, thirsty and reliable. I can live with that.

 

I have the 6.7... it's my first diesel... it won't be my last one... Diesel is the way to go if you tow in places other than the flat lands in my opinion....

 

I'm glad this thread can finally end the right way, given the time its been down, its allowed years of real world scenarios to play out. I've put almost 100k miles on my cummins since I was involved in this thread last time it was hot.


I've saved over 12,000 dollars in fuel in that time vs if I owned a v1urd. Considering that I have over 300 additional hp and almost triple the torque of a v10, I'd pay for the driving experience but I guess I could say I get paid for the driving experience....


Ive rebuilt the rear at 290k miles, rebuilt the t case while I was at it, and prob 2 sets of brakes in that 100k....nothing a normal truck wouldn't require. truck is on its 2nd injection pump currently and I am waiting for the clutch to tell me it's done (190k I put it in), but hasn't yet.


Since everyone has had years to learn about thermal efficiency and physics since the thread has been down, I guess we are all in agreement anyway and the above points are moot.

 

^^^^^^^^^^That's funny stuff there.

 

I'm not one to let math get in the way of a good argument, but here goes..... In 100,000 miles you claim to have saved $12,000 in fuel costs over a v10. Assuming the v10 got 12 mpg in 100,000 miles that is roughly 8,300 gallons of gas. At $2.20 per gallon that is roughly $18,000 in gas. Doing reverse math, you would have had to spend $6,000 in fuel to save $12,000. $6,000 divided by $2.70 per gallon is roughly 2,200 gallons. 100,000 miles divided by 2,200 gallons means your diesel is getting over 45 mpg's.

I believe your hp math is off too. If your truck has 545 hp then it doesn't have 300 more hp than a v10. The v10 has 365 hp, which is only 180 hp less.

 

So if my 7.3 gets about 14mpg and I've had it for over 7 years and 125K miles, and factoring in that I've paid as low as $2.50/gal and as high as $5.15/gal for barely refined kerosene, throw in the 15qt oil changes, 32qt coolant flushes, AND the 20qt transmission fluid changes...my wallet is still empty.


Thank goodness I can hang my hat on the re-sale value of a diesel AND 4x4...or maybe not...I think I'm going to go cry myself to sleep now...

 

I took a F-250 PSD for a test drive last spring and was totally blown away by it. The new 6.7 Power stroke was "quiet," and amazingly powerful! I really wanted one!! In my PSD-induced Testosterone haze, I was all set to pull the trigger on a $60K truck. I already had a diesel tractor, and a diesel generator,... so why not a diesel truck too?

My wife, (who was totally okay with my buying a new truck) saw through the hormonal dementia and brought me back to reality. She really dislikes the smell of diesel exhaust, and diesel fuel, and gives me he** whenever I get it on my shoes, or clothes. She said I could buy the diesel, but I would have to sleep in the truck too.

My choice: Diesel Truck, or Celibacy?

You can call me "whipped," but I still drive a Superduty.
Happy Wife = Happy Life ;-)

 

Im not sure where you have gotten fuel for 2.20-2.70 per gallon in the last 4 years but those numbers are ridiculous

U.S. Gasoline and Diesel Retail Prices

Sometimes regular and diesel are about the same price, and diesel prices are always within a 10% increase. I used an approximation of 3.50 and 3.20 which is being generous. I used 11 mpg average for the v10 and 19 for mine which are unloaded averages....either way you spin the numbers I've saved ~10k in fuel vs a gas slug over a 100k mile period. That's 30k over the life of the truck.

hp numbers are spot on actually....your v10 numbers are at the crank, mine are at the wheels. That puts a v10 ~250-275 wheel depending configuration, and mine well over 600 at the crank. Hence, 300 more hp. Enough to sling a v10 apart the first time it's throttled at that power level.

 

I have figured it out before as well and said it more than a few times here that I save $300 a year in fuel just on my camping trips.

My brother came along on a trip with me to pick up a truck out of WV. I fueled up and told him to take a **** because we aren't stopping till we are there. He gave me a funny look and smiled a bit (he is also a chevy guy ). Lo and behold 785 miles later we were at our destination in WV without a single stop on the way with car hauler in tow.

I would have had to stop twice with my gas truck to get gas.

 

That is the price at the pump today, so I used those numbers. The price may change, but the price differential is pretty close to the same. Whether it is $2.20 vs $2.70 or $5.00 vs $5.50, it is still a 50 cent difference. When I was running my 5.4(15 mpg) and 7.3(20mpg) at the same time for 5 years I found that the price difference negated my mpg advantage. If it had saved me the kind of money you are talking about I wouldn't have sold my 7.3.

I'm not sure where you get your hp loss numbers, but everything I have ever seen has been between 10-15% loss from the crank to the wheels. That would put a v10 at around 320 rwhp, not in the 250-270 range.

 

the price of fuel today is absolutely irrelevant to this particular discussion. I specifically indicated how much I've saved in the last 4 years vs driving a gasser, based on facts and statistics over that 4 year period.


I owned an '06 5.4 from brand new til last year, it got 11 mpg empty at best. I guess your 5.4 was magic, or it was a 1/2 ton...btw, diesel 1/2 tons are getting 25+mpg. my 4bt pulls 25mpg on a tank I beat it to death and it still has more power than your v10 and has 3/4 ton drivetrain.


"still a 50 cent difference" is an indication you don't really understand the math. If regular is 2.50 a gallon, and diesel is 3.00, diesel costs 20% more than gasoline. if regular is 5.00 a gallon and diesel is 5.50, that "still fifty cents more a gallon" is only 10% difference. meaning diesel is 10% more expensive than gasoline. by the way, the average of the last 4 years cost difference in fuel indicates diesel has been 9% more expensive than regular since 2011.


this is THE ONLY thing that matters in calculating fuel savings. If I'm getting 75% better fuel economy, and diesel costs 10% more than gasoline, I'm netting a fuel bill that is 65% less than if I was driving a gasser. so, "50 cents more" is irrelevant.


lastly, only a very small car would lose 10% through its drivetrain with a manual transmission. a "sports car" like a mustang, Camaro, vette, etc is more like 15% for manual trans loss, and 20% for automagic. trucks are even worse, manual 3/4 ton loses about 18-20%, automagics lose 23-25%.


sorry.

 

No the numbers you are posting of your truck is numbers on a performance tune meant for an empty truck. You try to do any kind of towing of something with any kind of weight and your EGTs will be thru the roof and the pistons will turn into a glob. In other words, worthless. Nice try though. I am sorry about you having to drive a Dodge around though.

 

well, I can see the facts don't change....but the type of responses stay the same regardless.


what exactly is a "performance tune" of a 24v ISB? the real hp gain is in the injectors....tuning alone wont make power.


I tow, and have for years, my bobcat (~6500 lbs) on my dump trailer (~4200) on the regular. I also have a tri axle pintle I beam trailer that i can load my bobcat and mini excavator on at the same time....I don't bust them out together on the regular but when I do, I'm not "turning my tuning down".


clown the dodge, yours wont do what mine does. im a fan of all things that are nice, all kinds of fords included, but your truck wont do what mine does and especially not for as long as mine has. In all reality, a 7.3 will do what my truck does, with a bit less hp, just as reliably with a little less fuel efficiency. a 6.4/zf6 will also, even a 6.0/zf6 that has been studded and deleted. common rails of all forms have their issues with injectors, no doubt, but that has its remedy also.


Neeext.

 

You don't even know what someone is referring to when they say "performance tune", you don't know that you can tune your truck electronically for more power both with and without aftermarket upgrades. You do not seem to have any grasp of EGTs and how they are important when towing, especially with elevated power levels. In other words your credability is zero. I'd be willing to bet the extent of towing you do of that bobcat/trailer is when you borrow it from your buddy to do work at your house. Wow.

FYI most of the guys running around with trucks built in the last 15 years or so whom want more power out of their diesel run some kind of aftermarket tuning. It can make quite a difference in power alone without any other upgrades.