A
Afton Chemical Corporation
Afton Chemical de Mexico
Amalie Oil Group
American Agip Company
American Refining Group
Attock Oil Company Limited
AZIZ Group

B
BASF
Baybridge Energy

C
Chembulk Tankers
Chemical Engineering Partners
Chemlube International
Chevron Corporation
CITGO Petroleum
CJSC Trade House ORGKHIM
Comercial Importadora
ConocoPhillips

D
Darby Trading
DSM

E
Ergon, Inc
Evonik RohMax
ExxonMobil

F
Far East Oil Terminal
Flint Hills Resources

G
General Motors

H
Haifa Basic Oils Ltd
Holly Refining and Marketing
Honda R&D Americas

I
Idemitsu Lubricants America Corporation
Infineum 
Infineum Brasil
Infineum USA

J
Jesco Resources
Jeyenkay Petrogels

K
Kline & Co

L
Lubes 'n' Greases
Lubline
Lubricating Specialties Company
Lubrizol
Lytham Group

M
MKR Products US
Motiva Enterprises

N
Nanda Petroleum & Chemical Products
National Refinery Limited
Neste Oil Corporation
Nippon Oil USA
Northeast Products Company
Nynas AB
Nynas DO Brasil
Nynas Mexico SA de CV
Nynas USA

O
Ozcinarlar Petroleum Products

P
Pacer Oil
Petrobras
Petroyag Kimyasallar 
Procter & Gamble Chemicals

Q
Quaker State
quantiQ - IQ Soluções & Quimica

R
Renkert Oil
RSH Oil Group

S
Safety-Kleen Systems
SBA Consulting
Selco Finance & Industrial Group
Shell US Trading Company
Shell Western Supply & Trading
Shem Lubricantes SA de CV
SK Lubricants Americas
Sonneborn
Sound Tankers Chartering
SSY
Standard Asiatic Oil Company
STASCO

T
Total Lubricants USA

U
United Color Manufacturing

V
Valero Marketing & Supply
Valvoline
Verco International
Vopak North America

W
Wallover Oil Company

Y
YPF