I've stuck with the Amsoil filters. I just order it when I order fluids. I may change to the Ford Performance filter since the Whipple is going on next week.
- Ford Performance (CM-6731-FL820): This is the winner if you want the absolute tightest filtration. It captures particles down to 12 microns (compared to AMSOIL's 20 microns) and features a massive 250 sq. in. of media surface area. The casing is heavy-gauge steel designed specifically to survive massive, violent oil pressure spikes when you stomp on the gas and the positive-displacement blower hits hard. Because supercharged trucks require short oil change intervals anyway, its shorter mileage lifespan doesn't matter.
- AMSOIL (EAO11): This is the winner for media stability and flow. Because it uses a 100% full-synthetic media with no cellulose fibers, it will not degrade, swell, or restrict flow if raw fuel washes past the rings under boost and dilutes the oil. The wire-backed synthetic pleats also offer highly uniform pores, ensuring excellent oil flow to the overhead valves, main bearings, and variable cam timing components during cold starts.
Verdict: If your priority is maximum burst strength and catching the absolute smallest microscopic particles, go with the Ford Performance filter. If you want a media that is completely immune to fuel dilution and offers maximum cold-start flow consistency, go with the AMSOIL.