What is the Super Duty Filter?
The AMSOIL Super Duty Oil Filter is a full flow oil filter designed for extended drain intervals and severe service. Its rugged filter body contains a high-tech blended filtration media composed of cellulose, synthetic and glass fibers. The media sets the Super Duty apart from conventional filters in capacity, efficiency and service life -- and that all adds up to superior filtration and protection.
Because of their limited filtering area, most "surface type" filters display good flow characteristics but are restricted in their capacity and longevity. "Surface-type" filters become obstructed relatively quickly, opening the relief valve and allowing unfiltered oil into the engine. Their lightweight construction also makes them susceptible to degradation.Conversely, the "surface-type" filter's weaknesses are the "depth-type" filter's strengths. A "depth-type" media generally displays excellent efficiency and capacity and is much more resistant to degradation. Increased oil flow demands, however, will push "depth-type" filter technology to new limits.
AMSOIL has always maintained that its long-life synthetic motor oils deserve a full-flow oil filter designed for the rigors of extended drain intervals. The AMSOIL Engine Oil Filter is specifically designed for the advanced filtration needs of AMSOIL Synthetic Motor Oils.
The lofted fiber "depth-type" media of the re-engineered AMSOIL Oil Filter combines the high-flow capacity of a "surface-type" filter with the particle-trapping and holding capabilities of a "depth-type" filter. The AMSOIL Lofted Fiber Oil Filter provides the best possible balance of capacity, efficiency, long life, and high flow capabilities.
Capacity
Filter capacity is the amount of contaminants a filter media can hold without loss of oil flow and filtration. The Super Duty's advanced media blend, especially its cellulose and synthetic media, provides outstanding capacity. Plus, the strength and flexibility of these fibers allow tight pleating. Pleating dramatically increases media surface area -- the tighter the pleating, the more surface area -- and increased surface area increases capacity while maintaining outstanding flow.Efficiency
Filter efficiency is a filter's ability to trap contaminants. The Super Duty Oil Filter's advanced media blend, especially its glass and synthetic media, offers tremendous efficiency, due to the fineness and uniform shape of their fiber strands.Service Life
Service life is the period a filter allows proper oil flow while trapping and holding contaminants. The Super Duty Oil Filter's capacity plays a significant role in the filter's extra-long service life (12,500 miles or 6 months).The filter's rugged construction plays an important role, too. For example, the Super Duty's steel coil spring, which centers the filter element inside the filter housing, springs back to its original shape after the filter's been subjected to shock loads. That helps the filter maintain its seal so oil flows through the media, not around it. Similarly, the Super Duty's fluted-rib spiral center tube stands up to pressures that may collapse the one-piece rolled tubes used in conventional oil filters. A collapsed center tube allows virtually all the oil to by-pass the filter media and circulate unfiltered.
The Big Picture
When you look at the big picture, the overall superiority of the AMSOIL SDF Oil Filter makes a big difference.Oil filters need good efficiency and good capacity to protect engines. Those with poor efficiency fail to trap a significant portion of particles large enough to damage the engine. Those with poor capacity fill quickly, and once filled, allow dirty oil to bypass the filtration media, circulate unfiltered and damage the engine. Capacity becomes an especially critical issue with extended oil drain intervals.
The AMSOIL Super Duty Oil Filter offers superior efficiency and capacity to those offered by other popular filters. While some other filters offer good efficiency, they do not offer nearly the capacity of the AMSOIL SDF. For those who wish to extend their oil drain intervals -- or even for those who simply go too long without an oil change -- the extra safety offered by the AMSOIL SDF Oil Filter makes a big difference.
Comparisons
Testing (SAE HS806 test method) shows the Super Duty's capacity is significantly greater than that of competitive filters, including Mobil 1, Pure 1, Hard Drive, AC, Napa, Fram and Wix. In fact, as you can see in this chart, the capacity of the AMSOIL SDF is nearly 20% higher than its nearest competitor, Mobil 1. The Super Duty's advanced media blend, particularly the cellulose and synthetic media, provides this outstanding capacity.
Testing (SAE HS806 test method) also shows the Super Duty's efficiency is greater than that of competitive filters as well, including Mobil 1, Pure 1, Hard Drive, AC, Napa, Fram and Wix. The fineness and uniform strand shape of the Super Duty's glass and synthetic media give the filter its tremendous efficiency.