Originally posted by Big Jim:
The K&N claims to have better flow charcteristics and if it is true that might be an advantage for hard driving.
The K&N has been actually tested past 14 GPM
The Motorcraft to 3GPM. Also an independant tester said it looked restrictive with the tight pleats & media, but no flow data work was done.
Oil pump is estimated to flow over 10GPM at ~6K.
I had better oil analysis results with the K&N than with the Motorcraft. Both Motorcraft filters oil tended to be far more broken down at the time of oil changes.
2 changes of Mobil 1 were at the bottom limits of viscosity and usable additives with the FL-820S after 3k & 3.5k. The K&N test was 4k and all readings were in the middle of the spectrum viscosity & additives wise and the contaminents where slightly lower.
My educated guess is with the FL-820S more oil is getting "bypassed" (which is NOT good) and the more restrictive filter media is causing extra heat and degradation.
Yes I am a "hard" driver...
