Air filter reccomendation, 13 Cascadia?

[Rawze]

Put a thick layer of grease into your intake pipe just past the air filter, then check it in a month to see how much dust is getting past the filter. Then do the same for the "after-market" filter. - Most report they will not be using those washable/after-market filters any more after seeing the difference.

A poor filtration on the air filter will polish out liners, eventually cause high oil consumption, and and inevitable inframe.

As far as "fuel mileage gains" -- That is nothing but absolute false hope, marketed garbage for the dipsh$it masses.