The K&N HP-2010 filter flows 14GPM (fact) and is "estimated" in the middle 90's for filter efficiency.
The Pure One/Motorcraft is rated at 98% efficiency and the K&N did better in my back to back oil analysis testing. (remember I am hard on my engine all the time)
I surmise the better flowing K&N filter bypasses less oil and therefore is less harsh on the oil (and subsequently the engine too!) and filters all the oil all the time instead of just a high percentage of it.
On the subject of oil analysis...
I am getting close to my next oil time change interval. I am eagerly anticipating the results from the analysis as this will be the first sample using an 8k redline the entire time.
I already have some ideas as to what levels are going to show being high. (hopefully not TIN
)
I have come to believe the stock rings don't like going past 7500rpm. (numerous indications)
If that assumption is correct then non-SVT engines (I.E. using non-upgraded rings) should stay well below that point.
Also I would strongly recommend upgraded rings (I.E. Total Seal) for any engine build!
