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Old 09-02-2010, 11:32 AM   #1 (permalink)
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DPF Delete mileage improvements

Has anyone hand calculated (not EVIC) the mileage improvements seen with deleting the DPF/EGR? Specifically, I'd like to see what improvements I might see with my dually, so if anyone with a dually has done this, I'd really like to hear your numbers. I'm already driving about 80% highway, so I'm not sure I'd see much increase in mileage.

I'd love to have parts falloff just to get rid of the fuel-in-oil and soot intake issues, but if I could have a good estimate on mileage improvements, I'd be able to caculate how long it would take me to recoup the $1500 investment.

Thanks,
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Old 09-02-2010, 11:40 AM   #2 (permalink)
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2010 Ram 2500 Laramie 4X4 (Dodge Ram 2500) | Fuelly

Took mine off on the 23rd. Its more consistantly above 18mpg. I still have the stock downpipe on if that makes a difference...
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Old 09-02-2010, 12:03 PM   #3 (permalink)
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18-19mpg for 3weeks now city drive only
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Old 09-02-2010, 12:20 PM   #4 (permalink)
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i took mine off in april. I've never got below 17. thats loaded down with 3,000lbs all the time too.
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Old 09-02-2010, 02:15 PM   #5 (permalink)
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Quote:
Originally Posted by novicane65 View Post
i took mine off in april. I've never got below 17. thats loaded down with 3,000lbs all the time too.
That's really good.

Is it a dually?
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Old 09-02-2010, 03:20 PM   #6 (permalink)
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yeah its a dually with 305/65/r17 mudders on it too. I'm not that easy on the throttle either. It's my work truck so I've put 15,000 on it since I unplugged the egr and did a new exhaust.
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Old 09-24-2010, 01:00 PM   #7 (permalink)
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single cab 4x4 dually 6 spd manual w/ custom flat bed so truck is heavy, a little over 9000 lbs unloaded. from Topeka to Houston 14.5 mpg. Deleted egr/cooler. Full turbo back 5" exhaust, H&S black maxx tuner. Mileage increased to 16.5 or so on return trip. Keep in mind this is going 75 as well. $1900 was total investment, will never pay back but feels better getting decent mileage and even in stock w/ out power turned up it was completely different truck!!! Actually fun to drive now! Only down side is that the clutch will slip if the power is turned up at all, though the clutch is probably a little weak from pulling extremely heavy loads.
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Old 09-26-2010, 08:05 PM   #8 (permalink)
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Just went 249 miles on 13.75 gallons -- 18.1 mpg EMPTY on a trip with Mini Maxx on HOT, full exhaust deletes, averaging 70 mph most of the way.

Before deletes I was around 14 / 15 mpg on the same trip.

BTW -- The MPG meter on the dash read 21.1. The 18.1 is carefully hand calculated.

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Old 09-26-2010, 08:52 PM   #9 (permalink)
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you wont get your money back and you may even break some stuff and become your own warrantee station. read that as 'costs you money'.

I have always been a BOMB guy, everything I own is modded someway. I'm doing the tuner and deletes for the performance, more power, better throttle responce. I also wanted gauges, which i've had on all the previous trucks, and I look as the extra mpg as just a bonus.

go with that mindset and you will be much happier!
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Old 09-26-2010, 11:39 PM   #10 (permalink)
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Ok, lets do some beer math and see... cause I too am looking at justifying the $1500 outlay for a 5" TBE and H&S.

14mpg for 5000 miles at $3.00 per gallon equals a total cost of $1071.43
18mpg for 5000 miles at $3.00 per gallon equals a total cost of $833.33

1071.43 - 833.33 = 238.09

$238.09 is your savings per 5000 miles. So, your $1500 outlay divided by $238.09 is 6.3. 6.3 X 5000 = 31,500 miles to pay off.

Now, that's nothing but fuel economy. Factor your risk. What is your warranty worth? Do you plan on having the vehicle past 35000 miles? How handy are you doing your own repairs?


In my opinion it's worth it (although I haven't done it yet), especially since most warranty work is CAUSED by the EGR and DPF system. Also, I haven't gotten about 14mpg driving in town anyway, just 12s and 13s... factor that into your math and my payoff is in 23k miles... Hope that helps yall.
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Old 09-26-2010, 11:46 PM   #11 (permalink)
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Quote:
Originally Posted by lreynard View Post
Ok, lets do some beer math and see... cause I too am looking at justifying the $1500 outlay for a 5" TBE and H&S.

14mpg for 5000 miles at $3.00 per gallon equals a total cost of $1071.43
18mpg for 5000 miles at $3.00 per gallon equals a total cost of $833.33

1071.43 - 833.33 = 238.09

$238.09 is your savings per 5000 miles. So, your $1500 outlay divided by $238.09 is 6.3. 6.3 X 5000 = 31,500 miles to pay off.

Now, that's nothing but fuel economy. Factor your risk. What is your warranty worth? Do you plan on having the vehicle past 35000 miles? How handy are you doing your own repairs?

In my opinion it's worth it (although I haven't done it yet), especially since most warranty work is CAUSED by the EGR and DPF system. Also, I haven't gotten about 14mpg driving in town anyway, just 12s and 13s... factor that into your math and my payoff is in 23k miles... Hope that helps yall.
Not to mention those people that get the dpf full message often and have to go drive on the freeway for no particular reason other than to clean out the dpf. Which means your miles driven and fuel used will go down. Plus you got to realize that your guys mileage will go up as you get more miles on your trucks. Towing helps break them in.
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Old 09-26-2010, 11:49 PM   #12 (permalink)
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Quote:
Originally Posted by lreynard View Post
Ok, lets do some beer math and see... cause I too am looking at justifying the $1500 outlay for a 5" TBE and H&S.

14mpg for 5000 miles at $3.00 per gallon equals a total cost of $1071.43
18mpg for 5000 miles at $3.00 per gallon equals a total cost of $833.33

1071.43 - 833.33 = 238.09

$238.09 is your savings per 5000 miles. So, your $1500 outlay divided by $238.09 is 6.3. 6.3 X 5000 = 31,500 miles to pay off.

Now, that's nothing but fuel economy. Factor your risk. What is your warranty worth? Do you plan on having the vehicle past 35000 miles? How handy are you doing your own repairs?


In my opinion it's worth it (although I haven't done it yet), especially since most warranty work is CAUSED by the EGR and DPF system. Also, I haven't gotten about 14mpg driving in town anyway, just 12s and 13s... factor that into your math and my payoff is in 23k miles... Hope that helps yall.
So the average driver will have it paid for in one year. Makes good sense to me.
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