I recently bought AMSOIL and an AMSOIL filter for the first time. When brought to me I immediatly noticed the larger box and said. Thats for a Prelude? They pulled out the filter and it did have some room in the box. But it looks larger than the PureONE I normally get & I believe most filters for the Prelude are the size of the PureONE.
I went to verify this and bought a new PureONE filter. Sure enough , the AMSOIL filter is larger.
Ill get more specs on the filters. But it seems amsoil is pretty good. I normally use the pureone purolator with mobil1. Im hoping the amsoil combo does better.
Then Im probably going to test K&N afterwards.
PureONE Model # 14459
Silicone Anti-Drainback Valve
More Pleats (more filter surface area)
PTFE Treated Sealing Gasket (makes it easier to remove)
Amsoil SuperDuty Oil Filter Model # SDF20
Oil Pressure Relief Valve
Heavy Duty Case of Drawn Steel
Cellulose, Synthetic and glass media blend (filter material)
Also inside you can see they are quite different.
Ill keep you updated.