Originally Posted By: Jeff_in_VABch
Originally Posted By: gregk24
What makes everyone think they are so good? I will tell you why I think they are so good...
1- Very efficient media. 99% at 20 microns and a stellar 80% efficient at 5 microns.
2- Good oil flow from the fully synthetic media.
3- Silicon ADBV.
4- They are built like tanks, metal end caps, sturdy canister, and wire backed media.
5- Capable of 15K miles OCI's.
6- Available at WM and Amazon for the low price of around $9.
Anything with a smaller filtration micron rating is going to have more pressure drop at a fixed filter size. Maybe it's a very small pressure drop and dosent matter. Has anyone measured it?
Full synthetic media typically has less pressure drop per square inch than cellulose media. You can have high flow and pretty low pressure drop if the right media and enough media is used, and still have very high filtration efficiency.
Here is the famous PureOne Flow vs PSID chart based on data from Purolator. A decently designed oil filter really doesn't have much pressure drop ... WAY less than the pressure drop across an engine's oiling system, which is typically 15 times more restrictive to flow than a typical oil filter.