Revhigh oil filters hold more than 45 percent more dirt than the leading national brand. We could stop here, but we're sure you want to know why.
Particle size retention (filtration efficiency) 
Particle size retention is the measure of the degree to which the filter can retain particles of various sizes. Revhigh has developed optimum particle size retention quality in filter media through extensive engine wear tests in the real world, at the race track and in the lab. In fact, Revhigh media in automotive full-flow oil filters traps and holds essentially all particles larger than 25 microns (a human hair is roughly 70 microns in diameter), while capturing a high percentage of even smaller particles.
Dirt-holding capacity
Dirt-holding capacity is the amount of contaminant that can be removed and held by the filter until the filter ceases to function. The dirt-holding capacity of Revhigh filters is significantly larger than the minimum manufacturer requirements between oil changes, which provides you with added security that contaminants captured by the filter stay in the filter.
A low restriction to oil flow is also critical to protecting vital engine parts. All Revhigh full-flow oil filters for automotive and light truck applications use arch-pleated, prescription-blended media, which provides low initial restriction to oil flow - less than 2 psi pressure drop when filtering oil at a rate of 4 gallons per minute at normal operating temperatures.