27-10-2017, 03:57 AM
Ruairidh, if I'm using detergent oil in the engine, wouldn't that be inappropriate for the gearbox? The reason I had asked about the Castrol GP 40 in this thread, was that we used it in Velos, both engine and gearbox. Some oils, (Delo 400 30w) note that it is detergent with anti foaming additives and high ZDDP levels.