EXHIBIT 4

        Puradyn Filter Technologies, Incorporated 1999 Stock Option Plan





                    PURADYN FILTER TECHNOLOGIES, INCORPORATED
                             1999 STOCK OPTION PLAN
                             ----------------------



     1. Grant of Options; Generally. In accordance with the provisions
hereinafter set forth in this stock option plan, the name of which is the
PURADYN FILTER TECHNOLOGIES, INCORPORATED 1999 STOCK OPTION PLAN (the "Plan"),
the Board of Directors (the "Board") or, the Compensation Committee (the "Stock
Option Committee") of Puradyn Filter Technologies, Incorporated (the
"Corporation") is hereby authorized to issue from time to time on the
Corporation's behalf to any one or more Eligible Persons, as hereinafter
defined, options to acquire shares of the Corporation's $.001 par value common
stock (the "Stock").

     2. Type of Options. The Board or the Stock Option Committee is authorized
to issue options which meet the requirements of Section 422 of the Internal
Revenue Code of 1986, as amended (the "Code"), which options are hereinafter
referred to collectively as ISOs, or singularly as an ISO. The Board or the
Stock Option Committee is also, in its discretion, authorized to issue options
which are not ISOs, which options are hereinafter referred to collectively as
NSOs, or singularly as an NSO. The Board or the Stock Option Committee is also
authorized to issue "Reload Options" in accordance with Paragraph 8 herein,
which options are hereinafter referred to collectively as Reload Options, or
singularly as a Reload Option. Except where the context indicates to the
contrary, the term "Option" or "Options" means ISOs, NSOs and Reload Options.

     3. Amount of Stock. The aggregate number of shares of Stock which may be
purchased pursuant to the exercise of Options shall be 2,000,000 shares. Of this
amount, the Board or the Stock Option Committee shall have the power and
authority to designate whether any Options so issued shall be ISOs or NSOs,
subject to the restrictions on ISOs contained elsewhere herein. If an Option
ceases to be exercisable, in whole or in part, the shares of Stock underlying
such Option shall continue to be available under this Plan. Further, if shares
of Stock are delivered to the Corporation as payment for shares of Stock
purchased by the exercise of an Option granted under this Plan, such shares of
Stock shall also be available under this Plan. If there is any change in the
number of shares of Stock on account of the declaration of stock dividends,
recapitalization resulting in stock split-ups, or combinations or exchanges of
shares of Stock, or otherwise, the number of shares of Stock available for
purchase upon the exercise of Options, the shares of Stock subject to any Option
and the exercise price of any outstanding Option shall be appropriately adjusted
by the Board or the Stock Option Committee. The Board or the Stock Option
Committee shall give notice of any adjustments to each Eligible Person granted
an Option under this Plan, and such adjustments shall be effective and binding
on all Eligible Persons. If because of one or more recapitalizations,
reorganizations or other corporate events, the holders of outstanding Stock
receive something other than shares of Stock then, upon exercise of an Option,
the Eligible Person will receive what the holder would have owned if the holder
had exercised the Option immediately before the first such corporate event and
not disposed of anything the holder received as a result of the corporate event.





          4. Eligible Persons.
             -----------------

             (a) With respect to ISOs, an Eligible Person means any individual
who is employed by the Corporation or by any subsidiary of the Corporation.

             (b) With respect to NSOs, an Eligible Person means (i) any
individual who has been employed by the Corporation or by any subsidiary of the
Corporation, (ii) any director of the Corporation or any subsidiary of the
Corporation, (iii) any member of the Corporation's advisory board member or of
any of the Corporation's subsidiar(ies), or (iv) any consultant of the
Corporation or by any subsidiary of the Corporation.

          5. Grant of Options. The Board or the Stock Option Committee has
the right to issue the Options established by this Plan to Eligible Persons. The
Board or the Stock Option Committee shall follow the procedures prescribed for
it elsewhere in this Plan. A grant of Options shall be set forth in a writing
signed on behalf of the Corporation or by a majority of the members of the Stock
Option Committee. The writing shall identify whether the Option being granted is
an ISO or an NSO and shall set forth the terms which govern the Option. The
terms shall be determined by the Board or the Stock Option Committee, and may
include, among other terms, the number of shares of Stock that may be acquired
pursuant to the exercise of the Options, when the Options may be exercised, the
period for which the Option is granted and including the expiration date, the
effect on the Options if the Eligible Person terminates employment and whether
the Eligible Person may deliver shares of Stock to pay for the shares of Stock
to be purchased by the exercise of the Option. However, no term shall be set
forth in the writing which is inconsistent with any of the terms of this Plan.
The terms of an Option granted to an Eligible Person may differ from the terms
of an Option granted to another Eligible Person, and may differ from the terms
of an earlier Option granted to the same Eligible Person.

          6. Option Price. The option price per share shall be determined by
the Board or the Stock Option Committee at the time any Option is granted, and
shall be not less than (i) in the case of an ISO, the fair market value, (ii) in
the case of an ISO granted to a ten percent or greater stockholder, 110% of the
fair market value, or (iii) in the case of an NSO, not less than 75% of the fair
market value (but in no event less than the par value) of one share of Stock on
the date the Option is granted, as determined by the Board or the Stock Option
Committee. Fair market value as used herein shall be:

             (a) If shares of Stock shall be traded on an exchange or
over-the-counter market, the closing price or the closing bid price of such
Stock on such exchange or over-the-counter market on which such shares shall be
traded on that date, or if such exchange or over-the-counter market is closed or
if no shares shall have traded on such date, on the last preceding date on which
such shares shall have traded.


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             (b) If shares of Stock shall not be traded on an exchange or
over-the-counter market, the value as determined by the Board of Directors or
the Stock Option Committee of the Corporation.

          7. Purchase of Shares. An Option shall be exercised by the tender
to the Corporation of the full purchase price of the Stock with respect to which
the Option is exercised and written notice of the exercise. The purchase price
of the Stock shall be in United States dollars, payable in cash or by check, or
in property or Corporation stock, if so permitted by the Board or the Stock
Option Committee in accordance with the discretion granted in Paragraph 5
hereof, having a value equal to such purchase price. The Corporation shall not
be required to issue or deliver any certificates for shares of Stock purchased
upon the exercise of an Option prior to (i) if requested by the Corporation, the
filing with the Corporation by the Eligible Person of a representation in
writing that it is the Eligible Person's then present intention to acquire the
Stock being purchased for investment and not for resale, and/or (ii) the
completion of any registration or other qualification of such shares under any
government regulatory body, which the Corporation shall determine to be
necessary or advisable.

          8. Grant of Reload Options. In granting an Option under this Plan,
the Board or the Stock Option Committee may include a Reload Option provision
therein, subject to the provisions set forth in Paragraphs 20 and 21 herein. A
Reload Option provision provides that if the Eligible Person pays the exercise
price of shares of Stock to be purchased by the exercise of an ISO, NSO or
another Reload Option (the "Original Option") by delivering to the Corporation
shares of Stock already owned by the Eligible Person (the "Tendered Shares"),
the Eligible Person shall receive a Reload Option which shall be a new Option to
purchase shares of Stock equal in number to the tendered shares. The terms of
any Reload Option shall be determined by the Board or the Stock Option Committee
consistent with the provisions of this Plan.

          9. Stock Option Committee. The Stock Option Committee may be
appointed from time to time by the Corporation's Board of Directors. The Board
may from time to time remove members from or add members to the Stock Option
Committee. The Stock Option Committee shall be constituted so as to permit the
Plan to comply in all respects with the provisions set forth in Paragraph 20
herein. The members of the Stock Option Committee may elect one of its members
as its chairman. The Stock Option Committee shall hold its meetings at such
times and places as its chairman shall determine. A majority of the Stock Option
Committee's members present in person shall constitute a quorum for the
transaction of business. All determinations of the Stock Option Committee will
be made by the majority vote of the members constituting the quorum. The members
may participate in a meeting of the Stock Option Committee by conference
telephone or similar communications equipment by means of which all members
participating in the meeting can hear each other. Participation in a meeting in
that manner will constitute presence in person at the meeting. Any decision or
determination reduced to writing and signed by all members of the Stock Option
Committee will be effective as if it had been made by a majority vote of all
members of the Stock Option Committee at a meeting which is duly called and
held.



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          10. Administration of Plan. In addition to granting Options and to
exercising the authority granted to it elsewhere in this Plan, the Board or the
Stock Option Committee is granted the full right and authority to interpret and
construe the provisions of this Plan, promulgate, amend and rescind rules and
procedures relating to the implementation of the Plan and to make all other
determinations necessary or advisable for the administration of the Plan,
consistent, however, with the intent of the Corporation that Options granted or
awarded pursuant to the Plan comply with the provisions of Paragraph 20 and 21
herein. All determinations made by the Board or the Stock Option Committee shall
be final, binding and conclusive on all persons including the Eligible Person,
the Corporation and its stockholders, employees, officers and directors and
consultants. No member of the Board or the Stock Option Committee will be liable
for any act or omission in connection with the administration of this Plan
unless it is attributable to that member's willful misconduct.

          11. Provisions Applicable to ISOs. The following provisions shall
apply to all ISOs granted by the Board or the Stock Option Committee and are
incorporated by reference into any writing granting an ISO:

             (a) An ISO may only be granted within ten (10) years from September
__, 1999, the date that this Plan was originally adopted by the Corporation's
Board of Directors.

             (b) An ISO may not be exercised after the expiration of ten (10)
years from the date the ISO is granted.

             (c) The option price may not be less than the fair market value of
the Stock at the time the ISO is granted.

             (d) An ISO is not transferrable by the Eligible Person to whom it
is granted except by will, or the laws of descent and distribution, and is
exercisable during his or her lifetime only by the Eligible Person.

             (e) If the Eligible Person receiving the ISO owns at the time of
the grant stock possessing more than ten (10%) percent of the total combined
voting power of all classes of stock of the employer corporation or of its
parent or subsidiary corporation (as those terms are defined in the Code), then
the option price shall be at least 110% of the fair market value of the Stock,
and the ISO shall not be exercisable after the expiration of five (5) years from
the date the ISO is granted.

             (f) The aggregate fair market value (determined at the time the ISO
is granted) of the Stock with respect to which the ISO is first exercisable by
the Eligible Person during any calendar year (under this Plan and any other
incentive stock option plan of the Corporation) shall not exceed $100,000.

             (g) Even if the shares of Stock which are issued upon exercise of
an ISO are sold within one year following the exercise of such ISO so that the
sale constitutes a disqualifying


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disposition for ISO treatment under the Code, no provision of this Plan shall
be construed as prohibiting such a sale.

             (h) This Plan was adopted by the Corporation on September __, 1999,
by virtue of its approval by the Corporation's Board of Directors. Approval by a
majority of the stockholders of the Corporation occurred on September __, 1999
and was ratified at the Company's 1999 Annual Meeting on ____________, 1999.

          12. Determination of Fair Market Value. In granting ISOs under this
Plan, the Board or the Stock Option Committee shall make a good faith
determination as to the fair market value of the Stock at the time of granting
the ISO.

          13. Restrictions on Issuance of Stock. The Corporation shall not be
obligated to sell or issue any shares of Stock pursuant to the exercise of an
Option unless the Stock with respect to which the Option is being exercised is
at that time effectively registered or exempt from registration under the
Securities Act of 1933, as amended, and any other applicable laws, rules and
regulations. The Corporation may condition the exercise of an Option granted in
accordance herewith upon receipt from the Eligible Person, or any other
purchaser thereof, of a written representation that at the time of such exercise
it is his or her then present intention to acquire the shares of Stock for
investment and not with a view to, or for sale in connection with, any
distribution thereof; except that, in the case of a legal representative of an
Eligible Person, "distribution" shall be defined to exclude distribution by will
or under the laws of descent and distribution. Prior to issuing any shares of
Stock pursuant to the exercise of an Option, the Corporation shall take such
steps as it deems necessary to satisfy any withholding tax obligations imposed
upon it by any level of government.

          14. Exercise in the Event of Death of Termination or Employment.
              ------------------------------------------------------------

             (a) If an optionee shall die (i) while an employee of the
Corporation or a Subsidiary or (ii) within three months after termination of his
employment with the Corporation or a Subsidiary because of his disability, or
retirement or otherwise, his Options may be exercised, to the extent that the
optionee shall have been entitled to do so on the date of his death or such
termination of employment, by the person or persons to whom the optionee's right
under the Option pass by will or applicable law, or if no such person has such
right, by his executors or administrators, at any time, or from time to time. In
the event of termination of employment because of his death while an employee or
because of disability, his Options may be exercised not later than the
expiration date specified in Paragraph 5 or one year after the optionee's death,
whichever date is earlier, or in the event of termination of employment because
of retirement or otherwise, not later than the expiration date specified in
Paragraph 5 hereof or one year after the optionee's death, whichever date is
earlier.

             (b) If an optionee's employment by the Corporation or a Subsidiary
shall terminate because of his disability and such optionee has not died within
the following three months, he may exercise his Options, to the extent that he
shall have been entitled to do so at the date of the


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termination of his employment, at any time, or from time to time, but not later
than the expiration date specified in Paragraph 5 hereof or one year after
termination of employment, whichever date is earlier.

             (c) If an optionee's employment shall terminate by reason of his
retirement in accordance with the terms of the Corporation's tax-qualified
retirement plans or with the consent of the Board or the Stock Option Committee
or involuntarily other than by termination for cause, and such optionee has not
died within the following three months, he may exercise his Option to the extent
he shall have been entitled to do so at the date of the termination of his
employment, at any time and from to time, but not later than the expiration date
specified in Paragraph 5 hereof or thirty (30) days after termination of
employment, whichever date is earlier. For purposes of this Paragraph 14,
termination for cause shall mean termination of employment by reason of the
optionee's commission of a felony, fraud or willful misconduct which has
resulted, or is likely to result, in substantial and material damage to the
Corporation or a Subsidiary, all as the Board or the Stock Option Committee in
its sole discretion may determine.

             (d) If an optionee's employment shall terminate for any reason
other than death, disability, retirement or otherwise, all right to exercise his
Option shall terminate at the date of such termination of employment.

          15. Corporate Events. In the event of the proposed dissolution or
liquidation of the Corporation, a proposed sale of all or substantially all of
the assets of the Corporation, a merger or tender for the Corporation's shares
of Common Stock the Board of Directors shall declare that each Option granted
under this Plan shall terminate as of a date to be fixed by the Board of
Directors; provided that not less than thirty (30) days written notice of the
date so fixed shall be given to each Eligible Person holding an Option, and each
such Eligible Person shall have the right, during the period of thirty (30) days
preceding such termination, to exercise his Option as to all or any part of the
shares of Stock covered thereby, including shares of Stock as to which such
Option would not otherwise be exercisable. Nothing set forth herein shall extend
the term set for purchasing the shares of Stock set forth in the Option.

          16. No Guarantee of Employment. Nothing in this Plan or in any
writing granting an Option will confer upon any Eligible Person the right to
continue in the employ of the Eligible Person's employer, or will interfere with
or restrict in any way the right of the Eligible Person's employer to discharge
such Eligible Person at any time for any reason whatsoever, with or without
cause.

          17. Non-transferability. No Option granted under the Plan shall be
transferable other than by will or by the laws of descent and distribution.
During the lifetime of the optionee, an Option shall be exercisable only by him.




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          18. No Rights as Stockholder. No optionee shall have any rights as
a stockholder with respect to any shares subject to his Option prior to the date
of issuance to him of a certificate or certificates for such shares.

          19. Amendment and Discontinuance of Plan. The Corporation's Board
of Directors may amend, suspend or discontinue this Plan at any time. However,
no such action may prejudice the rights of any Eligible Person who has prior
thereto been granted Options under this Plan. Further, no amendment to this Plan
which has the effect of (a) increasing the aggregate number of shares of Stock
subject to this Plan (except for adjustments pursuant to Paragraph 3 herein), or
(b) changing the definition of Eligible Person under this Plan, may be effective
unless and until approval of the stockholders of the Corporation is obtained in
the same manner as approval of this Plan is required. The Corporation's Board of
Directors is authorized to seek the approval of the Corporation's stockholders
for any other changes it proposes to make to this Plan which require such
approval, however, the Board of Directors may modify the Plan, as necessary, to
effectuate the intent of the Plan as a result of any changes in the tax,
accounting or securities laws treatment of Eligible Persons and the Plan,
subject to the provisions set forth in this Paragraph 19, and Paragraphs 20 and
21.

          20. Compliance with Rule 16b-3. This Plan is intended to comply in
all respects with Rule 16b-3 ("Rule 16b-3") promulgated by the Securities and
Exchange Commission under the Securities Exchange Act of 1934, as amended (the
"Exchange Act"), with respect to participants who are subject to Section 16 of
the Exchange Act, and any provision(s) herein that is/are contrary to Rule 16b-3
shall be deemed null and void to the extent appropriate by either the Stock
Option Committee or the Corporation's Board of Directors.

          21. Compliance with Code. The aspects of this Plan on ISOs is
intended to comply in every respect with Section 422 of the Code and the
regulations promulgated thereunder. In the event any future statute or
regulation shall modify the existing statute, the aspects of this Plan on ISOs
shall be deemed to incorporate by reference such modification. Any stock option
agreement relating to any Option granted pursuant to this Plan outstanding and
unexercised at the time any modifying statute or regulation becomes effective
shall also be deemed to incorporate by reference such modification and no notice
of such modification need be given to optionee.

              If any provision of the aspects of this Plan on ISOs is determined
to disqualify the shares purchasable pursuant to the Options granted under this
Plan from the special tax treatment provided by Code Section 422, such provision
shall be deemed null and void and to incorporate by reference the modification
required to qualify the shares for said tax treatment.

          22. Compliance With Other Laws and Regulations. The Plan, the grant
and exercise of Options thereunder, and the obligation of the Corporation to
sell and deliver Stock under such options, shall be subject to all applicable
federal and state laws, rules, and regulations and to such approvals by any
government or regulatory agency as may be required. The Corporation shall not be
required to issue or deliver any certificates for shares of Stock prior to (a)
the listing of such




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shares on any stock exchange or over-the-counter market on which the Stock may
then be listed and (b) the completion of any registration or qualification of
such shares under any federal or state law, or any ruling or regulation of any
government body which the Corporation shall, in its sole discretion, determine
to be necessary or advisable. Moreover, no Option may be exercised if its
exercise or the receipt of Stock pursuant thereto would be contrary to
applicable laws.

          23. Disposition of Shares. In the event any share of Stock acquired
by an exercise of an Option granted under the Plan shall be transferable other
than by will or by the laws of descent and distribution within two years of the
date such Option was granted or within one year after the transfer of such Stock
pursuant to such exercise, the optionee shall give prompt written notice thereof
to the Corporation or the Stock Option Committee.

          24. Name. The Plan shall be known as the "Puradyn Filter
Technologies, Incorporated 1999 Stock Option Plan."

          25. Notices. Any notice hereunder shall be in writing and sent by
certified mail, return receipt requested or by facsimile transmission (with
electronic or written confirmation of receipt) and when addressed to the
Corporation shall be sent to it at its office, 3020 High Ridge Road, Suite 100,
Boynton Beach, Florida 33426 and when addressed to the Committee shall be sent
to it 3020 High Ridge Road, Suite 100, Boynton Beach, Florida 33426, subject to
the right of either party to designate at any time hereafter in writing some
other address, facsimile number or person to whose attention such notice shall
be sent.

          26. Headings. The headings preceding the text of Sections and
subparagraphs hereof are inserted solely for convenience of reference, and shall
not constitute a part of this Plan nor shall they affect its meaning,
construction or effect.

          27. Effective Date. This Plan, the Puradyn Filter Technologies,
Incorporated 1999 Stock Option Plan, was adopted by the Board of Directors of
the Corporation on September 15, 1999. The effective date of the Plan shall be
the same date.

          Dated as of September 15, 1999.

                                      PURADYN FILTER TECHNOLOGIES,
                                      INCORPORATED

                                      /s/ Richard C. Ford
                                      -----------------------
                                      By: Richard C. Ford
                                      Its:  Chairman/CEO

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