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Does anyone make a portable CNG tank to use if you run empty?

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  • Wellarmed
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    I did miss quote if I said Dual-fuel. I did mean to say Bi-fuel. With out a forced induction system, gasoline should not be used as a default fuel. my two cents worth.

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  • larrycng
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    If the truth be known, you can fuel your LP vehicle at just about any place. with rare exception. If they can fill an RV with fix LP tank you're home free; same connector. There are a few that can fill only barbque bottles, that is a different fitting (and you can use adaptors)

    Most places, except the bulk plants don't know the difference between "motor fuel" and barbque bottles. The taxing structure is different because of the motor fuel tax; both get state sales tax. Most gas stations don't know difference, but charge prices higher than gasoline

    If you go into certain station it will cost you more with a Clean Fuels Card, (yes they have them for LP -- got one) than it would with without the CF card. You can fuel 24/7 in many places with the CF card.

    Curtis, I haven't notice that the LP follows the CNG prices. and haven't had the opportunity to check -- But I will.

    Later

    Larrycng

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  • Curtis
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    You are absolutely correct... But is it legal to buy LPG for motor fuel through a source that is not charging road tax and using W&M equipment to dispense?

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    But there are even fewer 'LPG as motor fuel' dispensers than CNG. Unless you drive near one you wouldn't have a choice but to buy fuel at these other places.

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  • Curtis
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    A note on the LPG costs. Stations owned by Clean Fuels USA tend to be priced around the cost of CNG in many instances. Availability of LPG and availability of LPG as a motor fuel is not the same.

    Motor fuel is dispenced through a Weights & Measures approved dispencer, like CNG. These tend to be fairly rare in comparison to locations that sell for portable bottles, which tends to run $1 more per gge (from what I see locally).

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Given the discussion about EPA confusing the terms, I thought you were running the two fuels together.

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  • Gerben
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Originally posted by Highmarker View Post
    Are there any dual-fuel OEMs?
    No, never heared of anyone making them.

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  • larrycng
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    My truck is gasoline or propane, whichever is cheapest. I would be paying about $1.65 per gal of Lp if I had it up here in Birch Bay, Wa instead of $2.65 per gal of gasoline. The LP is about 62% of gasoline which is a considerable savings; a net savings of 13%

    The propane injection (like Bully Dog and other) is somewhat a dual fuel system it that the vehicle under will run both on diesel and LP usually under higher throttle settings. The system will idle on diesel and both fuel when designed to.

    Most heavy duty diesel/cng dual fuel systems will idle on diesel and as the throttle is advanced cng is added up to around 80% to around 90%+. The Diesel fuel, which is timed injection is the "spark plug" that ignites the cng/air mixture that is in the cylinder and just a little lean to ignite on it own. When the system run out of CNG the go back to straight diesel. When they run out of diesel -- you're sol.

    There is a reduction on engine noise, but more important a significant on exhaust emissions and particulate matter.

    That is the simple version

    Larrycng

    PS. this thread is sure drifting
    Last edited by larrycng; 07-07-2009, 09:58 PM. Reason: additional comment

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Or did you mean Diesel/Propane?

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Why do you run CNG/Propane? Isn't the Propane a lot more expensive? Wouldn't the vehicle run on CNG alone?

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  • larrycng
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Guess I started that one, but you caught the point Highmarker.

    John is exactly right EPA, CARB and California Bureau of Auto Repair (SMOG) do the same thing, reverse the useage of dual fuel and bi-fuel as is stated in FMVSS 303 (49CFR 571.303) and they don't care. I have brought the point to the attention of both CARB and BAR

    The only "dual fuel" vehicles are generally heavy duty, diesel, vehicles. They are using a lot of them in Australia; Clean air power and Omnitek are two of the systems. Just for the record there are some light duty diesel/LPG units around, like Bully Dog.

    Probably time for this discussion again.

    And I do run Bi-fuel propane.

    Larrycng

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  • John Mitton
    replied
    Ah, the nomeclature

    EPA actually uses the reverse: Dual-fuel is a switched system, Bi-fuel is a blended system.

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    The original 'dual fuel' quote was from Wellarmed and I believe he meant 'bi-fuel.'

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  • Highmarker
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    Originally posted by freedml View Post
    Cavalier and Contour.
    Freedml,

    What Larrycng was referring to was "dual-fuel" not "bi-fuel". There is a difference.

    Bi-Fuel - Capable of running two separate fuels (Not simultaneously).
    Dual-Fuel - Running two separate fuels simultaneously.

    Cavaliers and Contours are bi-fuel. Are there any dual-fuel OEMs?

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  • freedml
    replied
    Re: Does anyone make a portable CNG tank to use if you run empty?

    The problem with Propane is that most Propane sellers are only open during daytime business hours -- RV suppliers, Propane specialists, Rental yards. And, the price of Propane is not very competitive and varies wildly even within blocks of other sellers (hmm, just like NG). Yes, you can easily run Propane in a NG engine, but the only application I know of available to consumers is 'tri-fuel' electric generators -- gasoline, NG and Propane.

    Leave a comment:

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