FOR IMMEDIATE RELEASE
MARCH 16, 2000
                                                                           13/00

                         BP AMOCO ADVANCES CONSTRUCTIVE
                              DISCUSSIONS WITH FTC

BP Amoco chief  executive  Sir John Browne said today that the company was at an
advanced  stage  in  "constructive"   discussions  with  the  US  Federal  Trade
Commission (FTC) on its proposed  combination with Atlantic  Richfield Co (ARCO)
and was hopeful of a successful outcome "within a matter of weeks".

Following  an earlier  announcement  in Alaska that BP Amoco and ARCO is to sell
ARCO's  Alaskan  businesses to Phillips  Petroleum for $7 billion,  Browne today
disclosed an agreement to sell ARCO's interests in the Cushing storage terminal,
together with various pipeline interests,  to TEPPCO Partners,  of Houston,  for
$355 million.

"With these major disposals we believe we have addressed the anti-trust concerns
of the  FTC.  We now  hope we can  move  forward  in the  coming  weeks  towards
obtaining a consent order allowing us to close the ARCO  combination and deliver
the  significant  synergies  of the  deal to the  shareholders  of the  combined
company."

Speaking at a presentation  to financial  analysts in the US and UK, Browne said
that,  subject to  completion  of the ARCO deal, BP Amoco had also today advised
the board of Vastar  Resources  Inc. of the intention to make a tender offer for
the minority  stockholding of the company at $71 a share. ARCO already owns some
82 per cent of Vastar,  one of the largest  independent oil and gas producers in
the US.

Browne told the analysts that,  subject to approval at BP Amoco's annual general
meeting  next month,  the company  intended to embark on a rolling  programme of
share buy-backs in the US and UK financial markets, beginning early May.

He said he  expected  the  synergies  from  ARCO to be  better  than  originally
estimated  when the deal was  announced  in April  last year.  "At the time,  we
envisaged  annualised  pre-tax  savings and  synergies of around $1 billion,  of
which $200 million would be from Alaska.

"Even  after  disposing  of ARCO's  Alaskan  interests,  we believe we can still
deliver $1 billion in savings.  The make-up of the savings  have  shifted but we
are  absolutely  confident  of the total  because the work we've done since last
April has shown the  potential  from  within  the  continuing  ARCO  businesses,
including Vastar."

Browne said the oil price had risen  sharply and ARCO's  financial  position had
improved markedly since the combination was first agreed,  with capital spending
of $2.7 billion in the interim and much lower  gearing than expected a year ago,
both factors which would significantly benefit the combined company.




He said the  combination  with ARCO  promised  a  "massive  boost" to BP Amoco's
growth  strategy,  giving the company a  coast-to-coast  refining and  marketing
presence in the US and  increasing  its oil and gas reserves by some 2.7 billion
barrels of oil  equivalent.  The  company's  gas and  liquids  production  would
increase by over 700,000 barrels a day of oil equivalent, including the addition
of 125,000  barrels a day to its UK North Sea production  and 360,000  barrels a
day - half of it gas - in the US Lower 48 and the Gulf of  Mexico,  mainly  from
ARCO's stake in Vastar.

In addition, it would add unbooked gas volumes of some 15 trillion cubic feet in
Thailand,  Malaysia,  the South China Sea, Qatar, and Indonesia where ARCO has a
net share of up to eight trillion  cubic feet in the Tangguh field,  regarded as
the most competitive  future liquefied natural gas project to supply the growing
demands of the Far East.

"This  will give us a  powerful  platform  for  upstream  growth  in Asia,  with
world-class  volumes  ready to supply  Japan,  Korea and other key  markets  now
recovering fast from recession," Browne said.

The  combination  would also add  interests to BP Amoco's  portfolio in Algeria,
Venezuela,  the Caspian and in Russia  where ARCO has an eight per cent stake in
Lukoil.

"In the  downstream  we are acquiring a great set of assets on the US West Coast
where demand has grown by 1.5 per cent a year  through the 1990s.  For the first
time, we will also have a  coast-to-coast  presence in marketing and refining in
the US."

Concluding  his remarks to the  analysts,  Browne said:  "We start with a strong
base, from which we are determined to grow.  We've  integrated BP and Amoco over
the last 15 months, with huge gains in productivity and early achievement of the
synergies we had targeted.

"We're making an agreed bid for Burmah Castrol which will bring new strengths in
some very  interesting  markets  and now we are hopeful of  completing  the ARCO
transaction in the near future.

"We have a new focus in some key areas of growth such as the  deepwater  Gulf of
Mexico,  the Caspian and the global gas business.  Today's  announcements add to
that growth  potential in a very  significant  way and they also  reinforce  the
commitment  we've  made  to  combine  growth  with  the  discipline  of  ongoing
performance."

The  offer  for  Vastar  has not yet  commenced.  This  press  release  does not
constitute an offer to buy any securities.  Any offer will be made pursuant to a
tender offer statement to be filed with the Securities and Exchange  Commission.
Vastar  shareholders  are advised to read the tender offer  statement when it is
available because it will contain important  information  relating to the offer.
Shareholders  will be able to obtain the tender offer  statement and other filed
documents  for free at the Internet  website  maintained by the  Securities  and
Exchange Commission at www.sec.gov.  In addition,  BP Amoco will make the tender
offer statement available for free to Vastar's shareholders.

Statements made in this press release,  particularly  those  regarding  savings,
demand,  gearing,  growth,  margins,  performance,   productivity,   production,
strategy, synergies,  strengths, volumes, BP/ Amoco merger effects, the proposed
ARCO combination and its effects,  are or may be forward looking  statements and
actual  results may differ  materially  from those  expressed or implied in such
statements.  Information  concerning




factors that could cause actual results to differ  materially  from those in the
forward looking  statements are contained in BP Amoco's latest  published annual
report and accounts and in BP Amoco's latest  published report on Form 20F filed
with the US Securities and Exchange Commission.

                                   -- ENDS --