Been posted here before several times dating back to the "Fram challenge" in 2011. Strangely though the links to the yt have either expired or changed. Thing I remember most about this yt is the showing of the oil pump pressure relief valve, and what can happen if it fails. Found that part interesting.
As for the Tough Guard, it's about ~$6 at Wally. Using the lowest AAP 20% off online code, P1 can be had for $4.80-$5.60 everyday depending on application. And I prefer that construction, but that's just me.
But, local Napa has semi annual 40% off Gold filters sale making them less than $4, so I have number of them now in my stash now.