CNG WORTH DOING FOR BETTER MILEAGE - Ford Truck Enthusiasts Forums



6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

CNG WORTH DOING FOR BETTER MILEAGE

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 03-31-2011, 06:51 AM
wulfman wulfman is offline
Posting Guru
Thread Starter
 
Join Date: Aug 2010
Location: knox Tn
Posts: 1,916
wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.
CNG WORTH DOING FOR BETTER MILEAGE

What do yall thing about compressed natural gas. I have heard it will extend fuel mileage a lot , is it worth the expense and will it hurt the engine.
Reply With Quote
  #2  
Old 03-31-2011, 07:53 AM
jdadamsjr's Avatar
jdadamsjr jdadamsjr is online now
Post Fiend
 
Join Date: Oct 2002
Posts: 11,220
jdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputationjdadamsjr has a superb reputation
there is another thread speaking just to that in the Ex forum here:
http://www.ford-trucks.com/forums/10...tural-gas.html

my only take is since T Boon and the gooberment is pushing it, it MUST be great for us!

(and this comes from someone getting regular gas royalty checks - that the gov't gets income tax AND property tax on !!!!)


but seriously - in all of the dfw area there are only 7 stations for over 4 million people.... wonder how few and far between they are in the boonies ?
Reply With Quote
  #3  
Old 04-02-2011, 12:50 PM
fraso fraso is offline
Senior User
 
Join Date: Apr 2006
Location: Fort Erie, ON
Posts: 145
fraso is starting off with a positive reputation.
You're asking about diesel-CNG dual fuel systems. CNG will extend (improve) your fuel economy because it is a way of substituting high cost diesel energy with low cost natural gas energy. There doesn't appear to be any public CNG stations in Knoxville and the closest station (Wartburg) appears to be selling CNG for $1.50/GGE. The price of CNG in DFW is about $2.35/GGE. However, there's a net federal CNG tax credit of $0.317/gallon, which means the net price for CNG is $2.03/GGE. Similarly, in Buffalo, NY, CNG is selling for $1.28/GGE or $1.09/DGE net.

A GGE has about 88% of the energy of a Diesel Gallon Equivalent (DGE) so the $2.03/GGE is really about $2.31/DGE. This means that you would be saving about $1.15/gallon in terms of diesel fuel (assuming $3.46/gallon diesel), but the amount you would save depends upon the amount of diesel fuel being substituted. You need to have an electronically-controlled CNG fuel system that can safely maximize CNG consumption to minimize your fuel costs.

To answer the OP's question - it's only worth it if you drive enough to pay back the cost of the conversion reasonably quickly. Depending upon the size of CNG cylinders used, a good diesel-CNG system will cost about $5-6000 installed. It won't hurt the engine if you use a good aftermarket injection system. Economy fumigation systems only have limited control over CNG delivery.

I've read reports of the substitution of 50-80% diesel fuel with CNG. See CNGchat Diesel-CNG. The Westport ISX-G engine uses a proprietary injection system to substitute 95% diesel.
Reply With Quote
  #4  
Old 04-02-2011, 04:23 PM
wulfman wulfman is offline
Posting Guru
Thread Starter
 
Join Date: Aug 2010
Location: knox Tn
Posts: 1,916
wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.wulfman has a great reputation on FTE.
Fraso thank you very much for your response i did not know they cost that much for the system, not cheap
Reply With Quote
  #5  
Old 04-03-2011, 01:40 PM
fraso fraso is offline
Senior User
 
Join Date: Apr 2006
Location: Fort Erie, ON
Posts: 145
fraso is starting off with a positive reputation.
Whether a system is cheap depends on a lot of factors besides the cost of the equipment. Let's pretend that your vehicle gets 15 mpg and you drive 30,000 miles/year. Diesel fuel will cost you $8,000/year @ $4/gallon and $10,000/year @ $5/gallon.

If you were to install a $6000 CNG system that substitutes 40% diesel and CNG costs $1.50/GGE ($1.18/GGE net), the payback on the CNG system will be about 2.8 years. If diesel goes up to $5.00/gallon, the payback becomes 2.1 years. If you do some dyno tuning with $4/gallon diesel and can now substitute 60% diesel, your payback becomes 1.9 years.

Instead of buying your CNG in Wartburg, let's say you live in Miami, OK where CNG costs $0.75/GGE ($0.43/GGE net) and you're substituting 50% of $4/gallon diesel, the payback is about 1.7 years. If diesel goes up to $5/gallon, the payback becomes 1.3 years.

Depending upon fuel prices, fuel consumption, annual mileage, installation cost, and substitution rate, a CNG system could actually be cheap.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Fiberglass parts $$$ Spiker7221 1973 - 1979 F-100 & Larger F-Series Trucks 4 08-30-2016 01:47 PM
6.7 diesel tuner worth it? insufishentfunds 1999 to 2016 Super Duty 4 06-09-2015 10:12 AM
to airdog or not to airdog that is the question lucaslaw 1999 - 2003 7.3L Power Stroke Diesel 17 05-25-2011 01:00 PM
looking to increase gas mileage on v 10 pab6800 Excursion - King of SUVs 14 11-13-2010 11:09 PM
Superchips programmer...worth it? TheTinian 1997 - 2003 F150 9 07-09-2008 10:18 AM


Go Back   Ford Truck Enthusiasts Forums >

Tags
73, carburetor, cng, diesel, f150, ford, fort, fuel, it, mileage, mpg, shop, truck, v8, worth

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 08:29 AM.