After giving the apparently much improved Olympian garage the chance to shine.... I tried to get some ZC90 gear oil today, parts guy didnt have a clue and said they stocked ZC75 which they use in all their car... rest my case they are still pants!
Anyway... Ive looked into this and yes, its hard to find generally but... Lambretta scooters use a 90 oil in their gearboxes and its readily available in GL1 spec from all good classic scooter shops, ordered some today. So the moral of the story is, god knows!
Anyway... Ive looked into this and yes, its hard to find generally but... Lambretta scooters use a 90 oil in their gearboxes and its readily available in GL1 spec from all good classic scooter shops, ordered some today. So the moral of the story is, god knows!