Some say NOAK is meaningless but I've noticed some people think because an oil has a NOAK of 6.5%, that it will burn less in engine X then an oil with a NOAK of 8%. I don't agree with this. There was another post awhile back that was a poll on how much oil your car used. (not the current thread). The consensus I get from what I've heard and read it that some engines consume more of a certain oil then others. I believe this is more to do with the visc. rather then NOAK. I don't see hardly any significance between oils that fall 1-3%pts away from one another in terms of NOAK. I would think anything below 9% would be more then enough.