Quote Originally Posted by 12vdc View Post
Its just the reverse. Poorer filtration due to larger micron rating, lower bpv youd have problems if system runs on higher pressure, drainback valve is useless since system is designed for full flow multi-pass probably doesn't sit above the sump just like most motors do. Its imperative to know the specs of both filter/engine lubrication system before substituting a filter.
A filter is a porous device for removing impurities or solid particles from a liquid or gas passed through it. Poorer fiteration is usually happen due to the larger micron rating, however, hydraulic and oil filter are almost same. For oil filters they help your machinery or equipment to run smoothly and without any delay(make sure you are using quality oil filters and lubricants). On the other hand we can keep the definition of hydraulic filter simple like "These filters keep the hydraulic fluid contaminant free" for faster effeciency same as oil filters. However, both are dependant on the applications. You can read ton of useful guides on oil filters and other industrial lubrication related issues and solution on this lubrication blog.