We are proud members of the following trade associations.

BTMA is the Trade Association for the UK manufacturing companies producing precision turned parts and machined components. We have been members since 2010 providing technical support for buyers and manufacturers within this sector.

UKLA is a Trade Association representing the interests of UK lubricant producers and allied sectors. Optimum has been a member since 2002. Membership enables us to ensure legal compliance and awareness of new technological advances in the automotive and industrial sectors.

VLS (Verification of Lubrication Specifications) is an independent organisation providing a credible and trusted means to verify lubricant specification.  

RPTA (Road Passenger Transport Association) exists to reduce the basic operating costs of the transport industry. The organisation selects reputable suppliers based on their customer service, quality and reliability. The RPTA negotiates reduced rates for products and services with its selected suppliers. Members are free to choose from any or all of the products and services we offer.