Yes the OEM is a washable and oilable foam element filter, and it should be done at up to 7500 miles. I recommend using Maxima's excellent air filter cleaner, and synthetic air filter oil:
Page 2-14 in the free repair manual download:
"Air Cleaner Element Cleaning-
○In dusty areas, the element should be cleaned more frequently than the recommended interval.
○After riding through rain or on muddily roads, the element should be cleaned immediately.
If dirt or dust is allowed to pass through into the throttle assy, the throttle may become stuck, possibly causing accident.
If dirt gets through into the engine, excessive engine wear and possibly engine damage will occur.
Fuel Tank (see Fuel Tank Removal in the Fuel System (DFI) chapter)
Air Switching Valve Hose [A]
Air Cleaner Element Screw [B]
Air Cleaner Element [C]
Upper Plastic Holder [A]
○The wire screen [A] is fastened with an adhesive for the shaded portion [B]. Do not remove the wire screen.
Clean the element in a well-ventilated area, and make sure that there are no sparks or flame anywhere near the working area. Because of the danger of highly flammable liquids, do not use gasoline or a low-flash point solvent to clean the element.
•Clean the element [A] in a bath of high-flash point solvent, and then dry it with compressed air or by shaking it.
•After cleaning, saturate a clean, lint-free towel with SE, SF, or SG class SAE 30 oil and apply the oil to the element by tapping the element outside with the towel.
•Visually check the element for tears or breaks.
•If the element has any tears or breaks, replace the element.
•Install the element unit [A] with the foam element side (gray) [B] facing down."