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How does AMSOIL, Oil-Wetted Gauze and Paper Air Filters Compare in Industry Standard Testing?

AMSOIL 2-Stage Air Foam Air Filter outperforms both high quality paper filter, low quality paper filters and oil-wetted gauze filters in the SAE J726C Test Method which tests for air flow, dirt removal and filter life.

Here's a more detailed test procedure and conclusive results covering AMSOIL vs. oil wetted gauze and paper air filters according to the Industry Standard Society of Automotive Engineers (SAE) test standard SAE J726.

Your car's engine "inhales" air that is mixed with fuel for combustion. But air contains an incredible amount of suspended dirt - typically 400 tons of it in a cubic mile. Much of this is microscopic dirt, extremely abrasive, that can cause serious damage inside the engine. Consequently, an air filter is a necessity. It provides an engine's first line of defense against airborne dust.

An air cleaner must not only trap as much grit as possible, but it should do so without "smothering" the engine, restricting its vital airflow. Thus the most desirable performance characteristics for an air cleaning device are high dirt-trapping efficiency, and minimal airflow restriction as the dirt accumulates.

The Society of Automotive Engineers Test Code J726 specifies the procedures, conditions, equipment, and report format which air filters can be uniformly compared. A standardized dust contaminant is introduced into a specially designed testing apparatus at a controlled rate. Most of the dust will be trapped in the filter undergoing the test; the remainder is captured in an "absolute filter".

The air pressure upstream and downstream of the test unit is monitored. The test terminates when the pressure differential causes a predetermined amount of fluid displacement on a water manometer. By quantifying and comparing weights, pressures, and elapsed time, the experimenter can determine a filters efficiency, capacity and airflow-based life expectancy.

Our J726 trials were conducted at an independent testing facility in the upper midwest. The tests compared Motorvator, K&N, Accel, Fram, and AMSOIL products. The results? AMSOIL proved vastly superior to the competitors' air cleaners as the only air filter to consistently score high marks in all three vital areas of airflow, efficiency and capacity.

The AMSOIL 2-Stage Air Filter traps airborne dust with 99% efficiency; it holds an incredible 281 grams of contaminant (that's over half a pound); and it outlasts the competition. It performs two to four times longer than the others. That's why AMSOIL can confidently recommend a 25,000 mile/1-year service life. And the 2-Stage is actually re-usable, with proper cleaning and re-oiling.

How does AMSOIL do it? Two different densities of lightly oiled polyurethane foam surrounding an expanded metal cage, precisely assembled by careful craftsman in AMSOIL's own manufacturing plant- that's how!

Testing results on AMSOIL TS52, K&N 1690 & AC A644C

Performed by Jim Bigley, author of The Diesel Page Website http://www.thedieselpage.com

Jim Bigley put the AMSOIL Two-stage Air Filter to side-by-side testing with two other popular air filters. Bigley tested a K&N #1690 oiled gauze performance filter, an AC A644C paper filter with an oiled foam wrap and the AMSOIL TS-52. All three filters were tested as received.

"I'm impressed," Bigley told independent AMSOIL Dealer of Idaho.

Bigley collected a road dust sample and treated it to pulverizing and grain sorting processes used in geological sample preparation. He tested each filter with a mixture of road dust grain sizes: four ounces with grain size smaller than 0.0049 inches, one ounce with grain size between 0.0049 inches and 0.0082 inches, and less than one ounce with grain size between 0.0082 inches and 0.0098 inches.

Bigley used a vacuum assembly, rated at 540 CFM, to pull air through the airbag. To test filtering efficiency, he coated three 4" X 4" ceramic plates with a very sticky tack oil and placed the plates inside the airbox on top of the fan cage so they could trap the particles that passed through the filter. He photographed each plate after test end.

Bigley reports, "K&N came in dead last in this test as expected. I expected the AC filter to do the best in the filtering efficiency test, but it came in just slightly (emphasis Bigley's) ahead of the K&N. Before testing the AC I didn't think anything could get through it, especially with (its) oiled foam wrap. The AMSOIL filter surprised me by winning this contest by a big margin. The advertising claim on the AMSOIL box which says, 'Proven Best for Removing Airborne Dirt' is no idle claim."

In his conclusion, Bigley reports, "From a filtering efficiency standpoint, the AMSOIL oiled foam filter element will protect your engine better than the other two style filters tested. No doubt about it."

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