Compressed Natural Gas
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More Turbo
Joined: Dec 2005
Posts: 669
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From: Idaho City Idaho
Compressed Natural Gas
I am looking into doing a CNG conversion where you use both CNG and diesel.
I did a search and there was not much info in using CNG on our trucks. The ones that were there was old posts.
first question: any one doing it?
What milage gains did you get?
How far could 10 gallons of CNG take you.
If I am running a chip will it make it to hot?
Just learning about it and trying to decide if it would save me enough money to do the conversion.
Thanks Keith
I did a search and there was not much info in using CNG on our trucks. The ones that were there was old posts.
first question: any one doing it?
What milage gains did you get?
How far could 10 gallons of CNG take you.
If I am running a chip will it make it to hot?
Just learning about it and trying to decide if it would save me enough money to do the conversion.
Thanks Keith
Lead Driver
Joined: Nov 2007
Posts: 5,578
Likes: 1
im pretty sure there is no milage gain from using cng just cheeper product...
My buddy is a fleet mechanic and says the city buses that have all switched to cng went from 10mpg on #2 to maybe 3mpg with CNG and they break down ALL the time.
Dosnt sound like a good choice to me... Just my .02c
My buddy is a fleet mechanic and says the city buses that have all switched to cng went from 10mpg on #2 to maybe 3mpg with CNG and they break down ALL the time.
Dosnt sound like a good choice to me... Just my .02c
Cargo Master
Joined: Jul 2011
Posts: 2,677
Likes: 981
From: Walpole, MA
I am looking into doing a CNG conversion where you use both CNG and diesel.
I did a search and there was not much info in using CNG on our trucks. The ones that were there was old posts.
first question: any one doing it?
What milage gains did you get?
How far could 10 gallons of CNG take you.
If I am running a chip will it make it to hot?
Just learning about it and trying to decide if it would save me enough money to do the conversion.
Thanks Keith
I did a search and there was not much info in using CNG on our trucks. The ones that were there was old posts.
first question: any one doing it?
What milage gains did you get?
How far could 10 gallons of CNG take you.
If I am running a chip will it make it to hot?
Just learning about it and trying to decide if it would save me enough money to do the conversion.
Thanks Keith
Typically it added an additional 50-100hp so PMR rods truck would need to be mindful. With respect to the chip, you would need to have it burned so the timing is retarded a bit otherwise your cylinder pressures will go through the roof and you will play pop goes the headgasket.
im pretty sure there is no milage gain from using cng just cheeper product...
My buddy is a fleet mechanic and says the city buses that have all switched to cng went from 10mpg on #2 to maybe 3mpg with CNG and they break down ALL the time.
Dosnt sound like a good choice to me... Just my .02c
My buddy is a fleet mechanic and says the city buses that have all switched to cng went from 10mpg on #2 to maybe 3mpg with CNG and they break down ALL the time.
Dosnt sound like a good choice to me... Just my .02c
Thread Starter
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More Turbo
Joined: Dec 2005
Posts: 669
Likes: 0
From: Idaho City Idaho
Yes the reason I was looking at doing it was the cost of the fuel 1.65 in Boise. By using the cng the mpg of diesel jumped up to 40mpg from what I was reading.
Thanks
Thanks
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Elder User
Joined: Dec 2010
Posts: 704
Likes: 1
im glad all of the city diesel trucks i work on for the city aint CNG cuz iv herd of alot of people talking about it and they hate it
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Joined: Sep 2011
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I bought a Dominion Gas work truck a 2000 Ford 150, 4x4 auto 2 years ago with factory installed CNG. Flip a switch on dash and your running CNG.. We just got 2 self serve CNG stations in Pittsburgh.. The tank takes about 4500 lbs of natural Gas.. it cost about $16 to fill the tank.. $1.84 gallon equivalent. I ran a few tests around town in stop and go traffic and figure it costs me about 16 cents a mile.. The truck cost was $4,500. By the way you can stand right by the exhaust with the truck idling and you can't smell a thing.. The truck has 131,000 miles and the exhaust is clean as a whistle and the truck runs like new.. I pulled an 8,000 lb trailer to Florida and back last year with no problems. I put 10,000 miles driving around florida and the trip but I used gasolene because I could not find convenient CNG stations. Remember just flip a switch and you run CNG or Gasolene..
Logistics Pro
Joined: Jun 2005
Posts: 4,243
Likes: 16
From: AZ
There is roughly 85,000 btu/gallon in CNG and there is roughly 132,000 btu/gallon of #2 diesel. So it is about 64% (85/132 = 0.64) as dense a btu source as diesel. Lets say you were getting 18 mpg on #2 diesel, you should expect to get about 11.5 mpg (.64 X 18 mpg) on CNG. So 10 gallons of CNG would take this hypothetical truck about 115 miles.
Now let's say diesel #2 costs $3.75 gallon and CNG costs $1.65 per gallon. In the same truck as the example above, a mile using CNG would cost you $1.65/11.5 = 14 cents per mile and on diesel #2 it would cost you $3.75/18 = 21 cents per mile for fuel...33% cheaper cost per mile running CNG.
Now let's say diesel #2 costs $3.75 gallon and CNG costs $1.65 per gallon. In the same truck as the example above, a mile using CNG would cost you $1.65/11.5 = 14 cents per mile and on diesel #2 it would cost you $3.75/18 = 21 cents per mile for fuel...33% cheaper cost per mile running CNG.
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