blow by rise double?
 

So I've read several other posts regarding blow by and on most of them it's just a copy paste job of cummins specs which is fine but my question is this ..when it says cummins specs we're simplified for rise only should I not multiply my number by 2? Without multiplying it by two my rise at 2200 is 6.5 inches and 2500 is 8.5 inches . I read on other posts that 2.5 inch new engine spec was 5 water inches ..is this correct or is my truck ready to blow ? Vacuum is plugged and no other mechanical problems truck has 215k and oil fill does haze if it matters