Was chatting the the people from welding and cutting equipment, they can supply transformer oil for all oil filled welding sets. BEFORE you chuck yours away, get a price. It isn't cheap. Also the old stuff is hazardous waste and pouring it down the drains will get you into an expensive fix. Welding Equipment & Cutting Services Ltd. 69 Tyler Street Sheffield S9 1DH Tel: 01142 42 42 42 http://www.wecs-ltd.co.uk They are extremely helpful, were able to answer all my technical questions Best of all they deal with the public and can get spares for all machines, been doing it for 32 years and it showed in their knowledge.