Sunoco Logistics Partners L.P. (NYSE: SXL) today announced that it will commence a binding Open Season for Project Mariner East. This Open Season is for the pipeline project to deliver propane and ethane from the liquid-rich Marcellus Shale areas in Western Pennsylvania, including MarkWest Energy Partners, L.P.'s processing and fractionation complex in Houston, Pennsylvania, to Southeastern Pennsylvania. The project is anticipated to have an initial capacity to transport approximately 65,000 barrels per day of natural gas liquids and can be scaled to support higher volumes as needed. Mariner East is expected to have the ability to transport propane by the second half of 2014. Mariner East is scheduled to be fully operational to deliver propane and ethane in the first half of 2015.

The Open Season will commence on August 9, 2012. Subject to the terms of the Open Season, priority service will be available to shippers making long-term volume commitments during the Open Season. The Notice of Open Season will be available on the Sunoco Logistics website at www.sunocologistics.com/me.

More information about this Open Season is available by contacting:

Hank Alexander
215-246-8568
hjalexander@sunocologistics.com

About Sunoco Logistics

Sunoco Logistics Partners L.P. (NYSE: SXL), headquartered in Philadelphia, is a master limited partnership that owns and operates a logistics business consisting of a geographically diverse portfolio of complementary pipeline, terminalling and crude oil acquisition and marketing assets. The Crude Oil Pipelines segment consists of approximately 5,400 miles of crude oil pipelines, located principally in Oklahoma and Texas. The Crude Oil Acquisition and Marketing segment consists of acquisition and marketing of crude oil and is principally conducted in the midcontinent and consists of approximately 200 crude oil transport trucks and approximately 120 crude oil truck unloading facilities. The Terminal Facilities segment consists of approximately 42 million shell barrels of refined products and crude oil terminal capacity (including approximately 22 million shell barrels of capacity at the Nederland Terminal on the Gulf Coast of Texas and approximately 5 million shell barrels of capacity at the Eagle Point terminal on the banks of the Delaware River in New Jersey). The Refined Products Pipelines segment consists of approximately 2,500 miles of refined products pipelines located in the northeast, midwest and southwest United States, and equity interests in four refined products pipelines.

Sunoco Logistics Partners L.P.
Thomas Golembeski (media) 215-977-6298
Pete Gvazdauskas (investors) 215-977-6322