It's just occurred to me, after taking delivery of transformer oil, that I have about 70 litres of straight SAE 90 from Morris's sitting in my shed. Two drums of 25 litres unopened and one drum with about 5 litres missing. It was originally bought to top up the gearbox/hydraulics of an old Nuffield tractor, which was sold before the oil got used. I can't match Peter's magnanimity and offer it free, but a tenner a drum? The original price (trade) from Morris's was about a hundred quid with VAT for the lot. I'll deliver locally (25 mile radius of Whitchurch, Shropshire) or can drop off en route from there to Maidenhead, Berkshire via M40 or M6/M1.