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Wildbob52 · 11-18-2013, 04:47 AM

My New Chev Truck can use natural gas as fuel and wondering what I would get in mpg? Thanks, Bob

2014 Chevrolet Silverado 2500HD

Alan24601 · 11-18-2013, 05:15 AM

I drove a CNG Honda for five years and it delivered about the same mpg as a gasoline version. CNG has about 2/3 the BTU of gasoline but it has a much higher octane rating, about 130. My Honda only ran on CNG and it had a 12 1/2 to 1 compression ratio. If your truck runs on both gasoline and CNG I think you will see a drop in mpg. If you run on CNG exclusively you will find the oil never changes color,very clean burning.

tuffr2 · 11-18-2013, 09:01 AM

This is from 50% experience with CNG and 50% knowlegabe opinion (opinion was told to me but I do not believe it fully.

I drove a CNG / Gasoline car for a few trips. The car performed poorly on CNG. When I flipped the switch from CNG to gasoline the car was a lot more zippy.

I was told the car performed poorly on CNG because it was tuned to run on gasoline.

I can kinda believe some of that but because CNG produces a lot less energy (BTU) than gasoline I am not convinced CNG is a viable automobile fuel yet.

Also back in the 90's there was a push for CNG that never took off in the USA.

schrederman · 11-19-2013, 03:07 PM

Truckers/railroaders are researching diesel/CNG hybrids that... as I understand it... run on both at the same time. This, if it becomes reality, will create much less demand for diesel, and those prices may fall... which would make diesel owners very happy...

glarnold · 11-19-2013, 03:18 PM

It's been my experience that when demand drops, prices go up. And when demand increases, prices go up.

JMHO

GL Arnold

DonDee · 11-19-2013, 04:27 PM

Quote:

Originally Posted by glarnold

It's been my experience that when demand drops, prices go up. And when demand increases, prices go up.

JMHO

GL Arnold

schrederman · 11-19-2013, 10:02 PM

Quote:

Originally Posted by glarnold

It's been my experience that when demand drops, prices go up. And when demand increases, prices go up.

JMHO

GL Arnold

I hate to... but I agree...

Ray,IN · 11-26-2013, 06:42 PM

Gasoline contains 110,250 btu per gallon.
CNG contains the GGE (gallon of gasoline-equivalent)114,716.88 btu
Reference: http://www.afdc.energy.gov/fuels/fue...ison_chart.pdf

iawoody2 · 11-26-2013, 07:32 PM

For now, locally cng is about half price of gas.

wa8yxm · 11-27-2013, 08:42 AM

The biggest problem with CNG vehicles I know of is gas stations,, Not many of them.. in teh country where I'm currently parked I know of only 4 and two of those are fleet stations owned by the fleet owner (Detroit Department of Transportation and DTE Enegery) only two are open to the public.. I used to get gasoline at one of 'em.

jimcumminsw · 11-27-2013, 01:22 PM

Quote:

Originally Posted by Wildbob52

My New Chev Truck can use natural gas as fuel and wondering what I would get in mpg? Thanks, Bob

2014 Chevrolet Silverado 2500HD

There are two forms of Natural Gas; Compress Natural Gas and Liquefied Natural Gas both have their disadvantages and advantages. Which version does your Chevy use? Is this a fleet truck of some sorts?

To me storage tank size for a pick-up truck would be a disadvantage since the Compress Natural Gas is stored at up to pressures of 3600psi and that it will take almost three gallons of natural gas to equal one gallon of gasoline energy. This tank would take up some space of the bed area so you will lose carrying capacity of the truck. You will also need a compressor and filling station that provides the ability to pump CNG. Advantage is lower cost and fewer emissions when natural gas is used. Now if the truck gets 21 MPG with gasoline it may get the 7 miles to the gallon with CNG. But the cost would be lower since CNG cost less and the US is an exporter of natural gas.

Now LNG is cooled to -165F to -260F and the tank size is smaller since it takes about 1.35 gallons of LNG to provide the equivalent of one gallon of gasoline energy and there is very little pressures involve about 4psi. Tank size is smaller than CNG but still larger than the gasoline tank plus it will need to be super cooled at all times since LNG is not a natural state for natural gas. Again you will need to find a station that provides the LNG and ability to pump the LNG. Advantage also would be lower cost and fewer emissions as above with CNG. Again if the truck was to achieve 21 MPG with gasoline it would get about 15 to 16 a gallon with LNG but again the cost would be lower.

Jim W.