Exhibit 99.1

UBS Warburg

Energy Conference

Jack Drosdick

May 20, 2003

Safe Harbor Statement

Those statements made during the course of this presentation that are not historical facts are forward-looking statements intended to be covered by the safe harbor provisions of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Although Sunoco believes that the assumptions underlying these statements are reasonable, investors are cautioned that such forward-looking statements are inherently uncertain and necessarily involve risks that may affect Sunoco’s business prospects and performance, causing actual results to differ from those discussed during the presentation, including any uncertainties with respect to the consummation of certain recently announced pending acquisitions. Such risks and uncertainties include, by way of example and not of limitation: general business and economic conditions; competitive products and pricing; changes in refining, chemical and other product margins; variation in petroleum-based commodity prices and availability of crude oil supply; fluctuations in supply of feedstocks and demand for products manufactured; changes in operating conditions and costs; changes in the expected level of environmental capital, operating or remediation expenditures; potential equipment malfunction; potential labor relations problems; the legislative or regulatory environment; plant construction/repair delays; nonperformance by major customers or suppliers; and political and economic conditions, including the impact of potential terrorist acts and international hostilities. These and other applicable risks and uncertainties have been described more fully in Sunoco’s First Quarter Form 10-Q filed on May 14, 2003 and in other periodic reports filed with the Securities and Exchange Commission.

Sunoco undertakes no obligation to update publicly any forward-looking statements whether as a result of new information or future events.

Strategy: Profitably Grow Sunoco

Goal: Increase share price and lower volatility

By:  1.     Increasing income from existing assets

2. Opportunistically growing all five businesses and / or buy back shares

3. Maintaining a strong balance sheet and investor confidence

4. Attracting investors with a long-term view

Strategy: Profitably Grow Sunoco

Goal: Increase share price and lower volatility

By:  1.     Increasing income from existing assets

2. Opportunistically growing all five businesses and / or buy back shares

3. Maintaining a strong balance sheet and investor confidence

4. Attracting investors with a long-term view

Sunoco Performance

Sunoco Performance

Sunoco Performance

Strategy: Profitably Grow Sunoco

Goal: Increase share price and lower volatility

By:  1.     Increasing income from existing assets

2. Opportunistically growing all five businesses and / or buy back shares

3. Maintaining a strong balance sheet and investor confidence

4. Attracting investors with a long-term view

Refining and Supply

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

Largest contributor to earnings and cash flow over past 4 years

average ROCE of 11 %

Increased capacity and productivity

record production in 2001/02

significant competitive improvement in UEDC/EII

20% capacity growth with Eagle Point

Retail Marketing

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

Steady earnings and excellent return

average 14 % ROCE over

1997- 2002

Have re-imaged and grown

net increase of 470 sites

since 1996

Significant new growth with

Speedway acquisition

expanded geography

Chemicals

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

World-scale phenol and

polypropylene position

good size chemical company

within Sunoco

Positive income and cash flow

at bottom of the cycle

Equistar transaction—strategic

backward integration in

polypropylene

Announced divestiture of plasticizers

1¢/# margin improvement

@ $0.50 /share

Other Businesses

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

Logistics

MLP IPO in February 2002

efficient growth vehicle

Value up 43 % since IPO

Sunoco interest $158 MM

Other Businesses

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

Logistics

MLP IPO in February 2002

efficient growth vehicle

Value up 43 % since IPO

Sunoco interest $158 MM

Coke

Significant income and cash

flow contributor

$724 MM proceeds since 1995

Growth potential — domestic

and international

Strategy: Profitably Grow Sunoco

Goal: Increase share price and lower volatility

By:  1.     Increasing income from existing assets

2. Opportunistically growing all five businesses and / or buy back shares

3. Maintaining a strong balance sheet and investor confidence

4. Attracting investors with a long-term view

Strategy: Profitably Grow Sunoco

Goal: Increase share price and lower volatility

By:  1.     Increasing income from existing assets

2. Opportunistically growing all five businesses and / or buy back shares

3. Maintaining a strong balance sheet and investor confidence

4. Attracting investors with a long-term view

Summary

Pro-Forma (12/31/02)

Capital Employed (MM$) in Businesses

Chemicals value not yet evident . . . yet Sunoco performance still competitive and positive