I'm planning on changing the gear box oil on my previously very neglected B. I read in the hand book one sort of oil, but then in the service cd it recommends ep80. I've bought some castrol ep 80 but have some valvoline 75w90 semi synthetic gear oil-would that be best? Which should i use for the best gear change/longevity of the gear box-any ideas more than welcome-the gl4 spec is met by the valvoline stuff by the way!
Jezzer
Jezzer