Calumet Specialty Products Partners, L.P. Prices Common Unit Offering

INDIANAPOLIS, Sept. 8, 2011 /PRNewswire/ — Calumet Specialty Products Partners,
L.P. (NASDAQ: CLMT) (“Calumet”) announced today that it priced an underwritten
public offering of 11,000,000 common units at $18.00 per unit. Calumet also
granted the underwriters a 30-day option to purchase up to 1,650,000 additional
common units. This offering is expected to close on September 14, 2011, subject
to customary closing conditions.

Calumet intends to use the net proceeds from this common units offering,
including a proportionate capital contribution from its general partner, to fund
a portion of the purchase price and related expenses of Calumet’s previously
announced acquisition of the Superior, Wisconsin refinery and associated
operating assets and inventories and related businesses from Murphy Oil
Corporation (the “Superior Acquisition”). The Superior Acquisition is expected
to close by the end of the third quarter, assuming all conditions to closing the
Superior Acquisition have been satisfied.

The closing of this common units offering is not conditioned on, nor is it a
condition to, the closing of the Superior Acquisition. If the Superior
Acquisition does not close or if the underwriters’ option to purchase additional
common units is exercised after the Superior Acquisition closes, then Calumet
intends to use the net proceeds from this common units offering, and any
proceeds from the exercise of the underwriters’ option to purchase additional
common units, for general partnership purposes, including working capital,
capital expenditures and acquisitions.

This press release shall not constitute an offer to sell or the solicitation of
an offer to buy nor shall there be any sale of these securities in any state in
which such offer, solicitation, or sale would be unlawful prior to registration
or qualification under the securities laws of such states.

Barclays Capital Inc., BofA Merrill Lynch, Deutsche Bank Securities Inc. and
J.P. Morgan Securities LLC are acting as joint book-running managers for the
offering. Credit Suisse Securities (USA) LLC, RBC Capital Markets Corporation
and Oppenheimer & Co. are acting as co-managers for the offering. A copy of the
prospectus and related prospectus supplement associated with this offering may
be obtained from the underwriters as follows:

Barclays Capital Inc.
c/o Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, NY 11717
E-mail: Barclaysprospectus@broadridge.com
Telephone: 1-888-603-5847

BofA Merrill Lynch
Attn: Prospectus Department
4 World Financial Center
New York, NY 10080
dg.prospectus_requests@baml.com

Deutsche Bank Securities Inc.
Attention: Prospectus Department
100 Plaza One, Jersey City, New Jersey 07311
E-mail: prospectus.cpdg@db.com
Telephone: (800) 503-4611

J.P. Morgan Securities LLC
via Broadridge Financial Solutions
1155 Long Island Avenue
Edgewood, New York 11717
Toll Free: (866) 803-9204

Calumet is a master limited partnership and is a leading independent producer of
high-quality, specialty hydrocarbon products in North America. Calumet processes
crude oil and other feedstocks into customized lubricating oils, solvents, and
waxes used in consumer, industrial, and automotive products. Calumet also
produces fuel products including gasoline, diesel and jet fuel. Calumet is based
in Indianapolis, Indiana and has five plants located in northwest Louisiana,
western Pennsylvania, and southern Texas, and a terminal located in Burnham,
Illinois.

This press release includes statements regarding this common units offering that
may constitute forward-looking statements. Such forward-looking statements are
subject to a variety of known and unknown risks, uncertainties, and other
factors that are difficult to predict and many of which are beyond management’s
control. Factors that can affect future results are discussed in Calumet’s
Annual Report on Form 10-K and other reports filed by Calumet from time to time
with the Securities and Exchange Commission. Calumet undertakes no obligation to
update or revise any forward-looking statement to reflect new information or
events.

SOURCE Calumet Specialty Products Partners, L.P.