My bricks done well over 100,000 km. I use Castrol GTX 20w50. I fill it to midway between the top of the red circle and the red dot. 10,000 km (~6,000 miles) later, at the next service it's still at about the same spot, but I spose it must have used some. That's so good I sometimes think there must be something wrong. Hopefully some others say their bricks use virtually no oil, or mine might have something wrong.