R30, BP98, 30:1, but changing to 20:1, my father always told me 25:1, and in early days of racing that is what l used, because he was an A Grade mechanic, and dotor of Mechnic. so l thought he new best.
so l am going to ask a dumb question, 20:1 ,ratio, 5lt of fuel to how much oil.
When l mixed 30;1, it was 333mls to 10lt. of fuel.