Castrol Syntec 5w50 every 5000KM and it is .5 litres down at that point.
If it is race season every 3000KM or 2 events, which ever comes first.
A big track weekend will cost a litre of oil. I expect to consume one in Pennsylvania in April.....lol

BTW, during the past winter months I have avoided the V-tec zone.....I know it's hard but with all this snow...........and the engine hardly consumed any oil...........