Spoke with a guzzi service guy today. They use GL5 75w90 in both ?
Got a bigger problem now. Came to fill up the engine oil and change the filter. Filter would not come loose (never had this before) Even resorted to sticking a screwdriver through it. Still wouldn't budge.
No option than to take the pan off. Will the pan come off, will it hell. Any ideas gratefully received.