Every oil change I’m undecided on what filter to use. Partly because there is almost too much information on filters in here, but also because we seem to focus on media efficiency more than flow.
With modern VVT engines, most have 2 stage oil pumps to reduce parasitic loss at lower rpm and provide the high flow needed to actuated cam phasers at higher RPMs.
As Purolator filters seem to be top quality, the inlet holes are very small in my application as compared to a factory filter. Also, which is better for flow, a spiral center tube or one with round holes?
The amsoil filter I just purchased doesn’t have a lot of inlet holes compared to the OE filter.
Should I be looking for a filter that has similar inlet hole area and center tube construction as well as a good micron rating? I wish flow specs were published as well as filtration efficiency.
With modern VVT engines, most have 2 stage oil pumps to reduce parasitic loss at lower rpm and provide the high flow needed to actuated cam phasers at higher RPMs.
As Purolator filters seem to be top quality, the inlet holes are very small in my application as compared to a factory filter. Also, which is better for flow, a spiral center tube or one with round holes?
The amsoil filter I just purchased doesn’t have a lot of inlet holes compared to the OE filter.
Should I be looking for a filter that has similar inlet hole area and center tube construction as well as a good micron rating? I wish flow specs were published as well as filtration efficiency.